Chapter 3: Q. 3.86 (page 93)

A $1.3 - g$ sample of rice is placed in a calorimeter. When the sample is burned, $22 kJ$ is given off. What is the energy value $(kcal / g)$ for the rice?

Short Answer

Expert verified

The energy value of rice is $4.1 kcal / g$ burning a sample in a calorimeter.

Step by step solution

Step: 1 Given Information:

Given data are: $1.3 g$ of sample rice in calorimeter and $22 kJ$ energy values.

To find the food's energy value by burning a sample in a calorimeter in $kcal / g$ .

Step: 2 Finding Energy Value:

Energy given by $1 g$ of rice

$= 1 g rice \times \frac{22 kJ}{1.3 g}$

$= 17 \frac{kJ}{g} \times \frac{1 kcal}{4.184 kJ}$

$= 4.1 kcal / g$

As a result,the energy value of rice is $4.1 kcal / g .$

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A $1.3 - g$ sample of rice is placed in a calorimeter. When the sample is burned, $22 kJ$ is given off. What is the energy value $(kcal / g)$ for the rice?

Short Answer

Step by step solution

Step: 1 Given Information:

Step: 2 Finding Energy Value:

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A 1.3−gsample of rice is placed in a calorimeter. When the sample is burned, 22kJis given off. What is the energy value (kcal/g) for the rice?

Short Answer

Step by step solution

Step: 1 Given Information:

Step: 2 Finding Energy Value:

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Physical Chemistry

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Study anywhere. Anytime. Across all devices.

A $1.3 - g$ sample of rice is placed in a calorimeter. When the sample is burned, $22 kJ$ is given off. What is the energy value $(kcal / g)$ for the rice?