My husband and I always disagree about the temperature in our house. I like it at 76.0°F, whereas he likes to set the thermostat to 73.0°F. As we take turns continually changing the setting, our poor heating and cooling system tries to keep up. I disagree that it causes us to waste money. My living room contains 57 kg of air. In the summer time, I pay about $0.15 per kWh of energy used. Explain how much does it cost me every time we heat the air in the living room from 73.0°F to 76.0°F? How many kWh does it take? The heat capacity of our air is 1.01 J/(g°C).