Question
Asked Jan 23, 2019

A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C. After combustion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries?

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Expert Answer

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Step 1

This problem is based on calorimeter where we need to find out Caloric value of the French fries.

Calorimeter is an apparatus which is used for measuring the quantity of Heat involved during chemical reaction. This heat may be absorbed or released.

And Caloric value is defined as the heat produced during complete combustion of specified amount of food.

Step 2

According to question:

Amount of French fries = 2.5 g

Quantity of water in calorimeter = 500 g

Initial temperature of water in calorimeter = 21 C

Final temperature of water in calorimeter = 48 C

Since the temperature of water in calorimeter rises that means water absorbed some amount of heat which can be calculated by using below formula:

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Step 3

Also, we know,

Amount of heat absorbed by water = amount of heat released by food

So, Lets calculate the amount of heat absorbed by water as we know the formula for that and the...

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