Question

It's 40 Celsius outside and you are enjoying 300 mL of 5 degree Celsius mint julep on your front porch. You fall asleep in the afternoon heat, and your mint julep warms up to ambient temperature.

a) What was the change in entropy of your drink?

b) When you awake, you are understandably upset and stick you drink back in the refrigerator to cool down. How much heat mist be removed from your drink?

c) You refrigerator has a coefficient of performance of 2.0. If the heat removed from your drink is dumped outside, what is the change in entropy of the universe when your drink is finally chilled back down?

Answer 1