Answer to Question #228633 in Atomic and Nuclear Physics for Yolande

Question

1, A glass contains melting ice. During the process:

A.The water temperature decreases

B. The temperature of ice remains constant

C. Ice Releases heat

D. The temperature of water increases 

Answer 1

When the ice melts, the heat energy is used to break the crystal lattice of the ice, hence its temperature stays constant at its melting point (0^oC). Therefore, the correct answer is B. However, option A may also apply for certain period of time at the beginning, if the ice was placed into initially warm water. In this case the water temperature will decrease until the equilibrium temperature is achieved.

Answer: B (also A if the water was warmer than 0^oC initially)