Q. 3.29 - An Introduction to General, Organic, and Biological Chemistry

Question

Calculate the kilocalories for each of the following:

$\left(a\right)$ one stalk of celery that produces$125 KJ$when burned in a calorimeter

$\left(b\right)$ a waffle that produces$870 KJ$ when burned in a calorimeter

Step-by-Step Solution

Answer

Part $\left(a\right)$

$\left(a\right)$The Converting kilocalories as  $125KJ=29.9 kcal.$

Part $\left(b\right)$

$\left(b\right)$The Converting kilocalories as $870KJ=207.9 kcal.$

Step: 1 Given information: (Part a)

One stake of celery is burned in a calorimeter given are: $125KJ$

To find when one stake of celery is burned in a calorimeter is converting into kilocalories.

Step: 2 Converting into Kilocalories: (Part a)

Calculate the rights and equality for these two components first, then convert into   $125KJ$ into $kcal.$

$1\mathrm{kJ}=4.184\mathrm{kcal}$

The factor as $\frac{1}{4.184}$

Converting as, $\mathrm{kcal}=125\times \frac{1}{4.184}$

$kcal=29.9 kcal.$

As a result, $125KJ=29.9 kcal.$

Step: 3 Given information: (Part b)

Waffle is burned in a calorimeter given are: $870 KJ$

To find when waffle is burned in a calorimeter is converting into kilocalories.

Step: 4 Converting into Kilocalories: (Part b)

Calculate the rights and equality for these two components first, then convert into $870KJ$ into $kcal.$ $1\mathrm{kJ}=4.184\mathrm{kcal}$

The factor as $\frac{1}{4.184}$

Converting as, $\mathrm{kcal}=870\times \frac{1}{4.184}$

$kcal=207.9 kcal.$

As a result, $870KJ=207.0 kcal.$