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Chapter 3: Q. 3.30 (page 77)

Calculate the kilocalories for each of the following:

aone cup of popcorn that produces131kJwhen burned in a calorimeter

ba sample of butter that produces 23.4kJwhen burned in a calorimeter

Short Answer

Expert verified

Part a

aThe converting energy into kilocalories as131kJ=31.31kcal.

Part b

bThe converting energy into kilocalories as23.4KJ=5.6kcal.

Step by step solution

01

Step: 1 Given information: (Part a) 

One cup of popcorn is burned in a calorimeter given are: 131KJ

To find one cup of popcorn burned in a calorimeter is converting into kilocalories.

02

Step: 2 Converting intoKilocalories: (Part a) 

Converting 131KJinto kcal

The factor as 1kcal=4.184kJ

131kJ=131kJ脳1kJ4.184kcal

As a result,

131kJ=31.31kcal.

03

Step: 3 Given information: (Part b) 

Sample of butter is burned in a calorimeter given are: 23.4KJ

To find sample of butter burned in a calorimeter is converting into kilocalories.

04

Step: 4 Converting into Kilocalories: (Part b) 

Converting23.4KJinto kcal

The factor as 1kcal=4.184kJ

23.4kJ=23.4kJ脳1kJ4.184kcal

As a result,

23.4KJ=5.6kcal.

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