A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what would be the approximate increase in the temperature of the water? (Note: A liter of cold water weighs about 1 kg.)

Question

Quizplus · Accepted Answer

The energy required to raise the temperature of 1 kg of water by 1°C is approximately 1 kcal. Since the pizza has 500 kcal, and there are 50 liters (or kg) of water, the temperature increase can be calculated as 500 kcal / 50 kg = 10°C.

A Slice of Pizza Has 500 Kcal