Does anyone have the answer to 21 on AAMC 6R?

[UCLAstudent]

It's the question about the peanut. There is just an arrow on my answer sheet... no answer. Thanks!

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[mr.pink]

C. ten peanuts=50 kcal, therefore 1 peanut=5 kcal.

 

[premyo2002]

how did you guys do on the verbal section compared to the other exams... I'm just curious because I went down two points

 

[UCLAstudent]

Thank you!

 

[UCLAstudent]

Wait, wouldn't the answer be B, 1 kcal?

Using Q=MCT and solving for Q:

Q= (1000 grams) x (1 J/(gxC)) x 50C

I got 50,000 Joules. Divide by 10 for to get 5,000 Joules per peanut. 5,000 Joules = 1 Kcal.

Did I mess something up?

 

[a*brown]

Originally posted by UCLAstudent
Wait, wouldn't the answer be B, 1 kcal?

Using Q=MCT and solving for Q:

Q= (1000 grams) x (1 J/(gxC)) x 50C

I got 50,000 Joules. Divide by 10 for to get 5,000 Joules per peanut. 5,000 Joules = 1 Kcal.

Did I mess something up?

Don't use c = 1 J/g C because that's wrong. c = 1 cal/g C

So...

q = (1000 g) (1 cal/g C) (50 C) = 50,000 cal = 50 kcal for 10 peanuts.

5 kcal = 1 peanut