The amount of energy required to heat water for a 10-minute shower (50 gallons) is 2.2125 kJ. How many calories is this

First, we convert the given amount of energy into joules.

1 kJ = 1000 joules

2.2125 kJ = 2,212.5 Joules

Each kilocalorie contains 4,184 Joules

Kilocalories = 2,212.5 / 4,182

Kilocalories = 0.529

1 kilocalorie = 1000 calories

0.529 kilocalories = 529 calories