Barron states that 4.18×10⁸ joules equal 1 kcal, is this correct?How can melting point equal freezing point?Does liquids that emit light when vibrated exist?Why is it that less useful energy can be extracted in explosive reactions?Does Gibbs free energy of formation always equal zero for elements in standard state?“Exactly Equal” and “At Least” in electron excitationCan the number of intermediates for a reaction be more than the total number of transition states?How is chemical energy stored in carbonpolymer/resin/material that melts around 40 CCalculating the number of energy states in a particular momentum directionShape of the container and the number of possible energy states
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Barron states that 4.18×10⁸ joules equal 1 kcal, is this correct?
How can melting point equal freezing point?Does liquids that emit light when vibrated exist?Why is it that less useful energy can be extracted in explosive reactions?Does Gibbs free energy of formation always equal zero for elements in standard state?“Exactly Equal” and “At Least” in electron excitationCan the number of intermediates for a reaction be more than the total number of transition states?How is chemical energy stored in carbonpolymer/resin/material that melts around 40 CCalculating the number of energy states in a particular momentum directionShape of the container and the number of possible energy states
$begingroup$
Here is a paragraph in Barron's SAT chemistry prep book:
Work itself is measured in Joules, and so is energy. In some problems, however, energy may be expressed in kilocalories. The relationship between these two units is that $4.18times10^8$ Joules equals 1 kilocalorie (kcal).
Is this correct? Isn't 1 kilocalorie 4180 Joules?
energy units
edited 15 mins ago
Melanie Shebel♦
3,53873273
asked 5 hours ago
Luke KongLuke Kong
162
New contributor
Luke Kong is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
Here is a paragraph in Barron's SAT chemistry prep book:
Work itself is measured in Joules, and so is energy. In some problems, however, energy may be expressed in kilocalories. The relationship between these two units is that $4.18times10^8$ Joules equals 1 kilocalorie (kcal).
Is this correct? Isn't 1 kilocalorie 4180 Joules?
energy units
edited 15 mins ago
Melanie Shebel♦
3,53873273
asked 5 hours ago
Luke KongLuke Kong
162
New contributor
Luke Kong is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
Here is a paragraph in Barron's SAT chemistry prep book:
Work itself is measured in Joules, and so is energy. In some problems, however, energy may be expressed in kilocalories. The relationship between these two units is that $4.18times10^8$ Joules equals 1 kilocalorie (kcal).
Is this correct? Isn't 1 kilocalorie 4180 Joules?
energy units
edited 15 mins ago
Melanie Shebel♦
3,53873273
asked 5 hours ago
Luke KongLuke Kong
162
New contributor
Luke Kong is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
Here is a paragraph in Barron's SAT chemistry prep book:
Work itself is measured in Joules, and so is energy. In some problems, however, energy may be expressed in kilocalories. The relationship between these two units is that $4.18times10^8$ Joules equals 1 kilocalorie (kcal).
Is this correct? Isn't 1 kilocalorie 4180 Joules?
energy units
energy units
edited 15 mins ago
Melanie Shebel♦
3,53873273
asked 5 hours ago
Luke KongLuke Kong
162
New contributor
Luke Kong is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 15 mins ago
Melanie Shebel♦
3,53873273
asked 5 hours ago
Luke KongLuke Kong
162
New contributor
Luke Kong is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 15 mins ago
Melanie Shebel♦
3,53873273
edited 15 mins ago
Melanie Shebel♦
3,53873273
edited 15 mins ago
Melanie Shebel♦
3,53873273
3,53873273
asked 5 hours ago
Luke KongLuke Kong
162
New contributor
Luke Kong is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 5 hours ago
Luke KongLuke Kong
162
asked 5 hours ago
Luke KongLuke Kong
162
162
New contributor
Luke Kong is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Luke Kong is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
1
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$begingroup$
This should never have happened in the scientific community, but:
The energy values of food are measured by the Calorie, with a capital C. A Calorie is equal to 1,000 calories or 1 kilocalorie (kcal).
Source: here
It is possible that Barron's got confused between Calorie and calorie. Even so, they still would be off by a factor of 100.
According to Wikipedia:
The SI unit of energy is the joule, with symbol "J"; one small calorie is now defined as exactly 4.184 J, and one large calorie is 4184 J. However, the two units are still used occasionally in technical work, and the large calorie is still widely used in nutrition.
So you are correct in saying that 1 "small" kilocalorie is 4180 joules. 1 "large" kilocalorie is $pu4.18e6 J$, and maybe Barron's is now suggesting an "extra large" calorie.
More likely it is just a typo.
edited 14 mins ago
Melanie Shebel♦
3,53873273
answered 5 hours ago
Karsten TheisKarsten Theis
6,145947
$endgroup$
add a comment |
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1 Answer
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$begingroup$
This should never have happened in the scientific community, but:
The energy values of food are measured by the Calorie, with a capital C. A Calorie is equal to 1,000 calories or 1 kilocalorie (kcal).
Source: here
It is possible that Barron's got confused between Calorie and calorie. Even so, they still would be off by a factor of 100.
According to Wikipedia:
The SI unit of energy is the joule, with symbol "J"; one small calorie is now defined as exactly 4.184 J, and one large calorie is 4184 J. However, the two units are still used occasionally in technical work, and the large calorie is still widely used in nutrition.
So you are correct in saying that 1 "small" kilocalorie is 4180 joules. 1 "large" kilocalorie is $pu4.18e6 J$, and maybe Barron's is now suggesting an "extra large" calorie.
More likely it is just a typo.
edited 14 mins ago
Melanie Shebel♦
3,53873273
answered 5 hours ago
Karsten TheisKarsten Theis
6,145947
$endgroup$
add a comment |
$begingroup$
This should never have happened in the scientific community, but:
The energy values of food are measured by the Calorie, with a capital C. A Calorie is equal to 1,000 calories or 1 kilocalorie (kcal).
Source: here
It is possible that Barron's got confused between Calorie and calorie. Even so, they still would be off by a factor of 100.
According to Wikipedia:
The SI unit of energy is the joule, with symbol "J"; one small calorie is now defined as exactly 4.184 J, and one large calorie is 4184 J. However, the two units are still used occasionally in technical work, and the large calorie is still widely used in nutrition.
So you are correct in saying that 1 "small" kilocalorie is 4180 joules. 1 "large" kilocalorie is $pu4.18e6 J$, and maybe Barron's is now suggesting an "extra large" calorie.
More likely it is just a typo.
edited 14 mins ago
Melanie Shebel♦
3,53873273
answered 5 hours ago
Karsten TheisKarsten Theis
6,145947
$endgroup$
add a comment |
$begingroup$
This should never have happened in the scientific community, but:
The energy values of food are measured by the Calorie, with a capital C. A Calorie is equal to 1,000 calories or 1 kilocalorie (kcal).
Source: here
It is possible that Barron's got confused between Calorie and calorie. Even so, they still would be off by a factor of 100.
According to Wikipedia:
The SI unit of energy is the joule, with symbol "J"; one small calorie is now defined as exactly 4.184 J, and one large calorie is 4184 J. However, the two units are still used occasionally in technical work, and the large calorie is still widely used in nutrition.
So you are correct in saying that 1 "small" kilocalorie is 4180 joules. 1 "large" kilocalorie is $pu4.18e6 J$, and maybe Barron's is now suggesting an "extra large" calorie.
More likely it is just a typo.
edited 14 mins ago
Melanie Shebel♦
3,53873273
answered 5 hours ago
Karsten TheisKarsten Theis
6,145947
$endgroup$
This should never have happened in the scientific community, but:
The energy values of food are measured by the Calorie, with a capital C. A Calorie is equal to 1,000 calories or 1 kilocalorie (kcal).
Source: here
It is possible that Barron's got confused between Calorie and calorie. Even so, they still would be off by a factor of 100.
According to Wikipedia:
The SI unit of energy is the joule, with symbol "J"; one small calorie is now defined as exactly 4.184 J, and one large calorie is 4184 J. However, the two units are still used occasionally in technical work, and the large calorie is still widely used in nutrition.
So you are correct in saying that 1 "small" kilocalorie is 4180 joules. 1 "large" kilocalorie is $pu4.18e6 J$, and maybe Barron's is now suggesting an "extra large" calorie.
More likely it is just a typo.
edited 14 mins ago
Melanie Shebel♦
3,53873273
answered 5 hours ago
Karsten TheisKarsten Theis
6,145947
edited 14 mins ago
Melanie Shebel♦
3,53873273
edited 14 mins ago
Melanie Shebel♦
3,53873273
edited 14 mins ago
Melanie Shebel♦
3,53873273
3,53873273
answered 5 hours ago
Karsten TheisKarsten Theis
6,145947
answered 5 hours ago
Karsten TheisKarsten Theis
6,145947
answered 5 hours ago
Karsten TheisKarsten Theis
6,145947
6,145947
add a comment |
add a comment |
Luke Kong is a new contributor. Be nice, and check out our Code of Conduct.
Luke Kong is a new contributor. Be nice, and check out our Code of Conduct.
Luke Kong is a new contributor. Be nice, and check out our Code of Conduct.
Luke Kong is a new contributor. Be nice, and check out our Code of Conduct.
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