Chapter 9Thermal Energy

9.5 Heat Units are Energy Units

One calorie

• The energy needed to change 1 gram of H2O by 1

Joules

4.184 J = 1 calorie

1000 calories

• 1 kilocalories• 1 kcal• 1 Calorie (food calorie)

Example 1

Convert 245 calories to kilocalories.

Example 2

Convert 4.50 kilocalories to calories.

Example 3

Convert 3800 calories to Calories.

Example 4

Convert 65 Calories to calories.

Example 5

Convert 830 calories to joules.

Example 6

Convert 364 joules to calories.

Example 7

Convert 9008 joules to Calories.

Example 8

Convert 160 Calories to joules.

Ex: Determining the Energy Content of Food