Question

STT 11.7 Which of the following processes foes not involve a change in entropy?

A an electric heater raised the temp ofa cup of water by 20C
B a ball rolls up a ramp, decreasing in speed as it rolls higher
C A basketball is dropped from 2 m and bounces until it comes to rest D the sun shines on a black surface and warms it

Answer 1

An electric heater raising the temperature of a cup of water does not involve a change in entropy.

Step-by-step explanation:

The process that does not involve a change in entropy is option A: an electric heater raising the temperature of a cup of water by 20°C. In this process, the heat energy is transferred from the heater to the water, causing a temperature increase, but there is no change in the disorder or randomness of the molecules in the system.