Phase Changes: a Chunk of Ice (T = -20°C) Is

question 23

Multiple Choice

Phase changes: A chunk of ice (T = -20°C) is added to a thermally insulated container of cold water (T = 0°C) . What happens in the container?

• A) The ice melts until thermal equilibrium is established.
• B) The water cools down until thermal equilibrium is established.
• C) Some of the water freezes and the chunk of ice gets larger.
• D) None of the above things happen.

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Definitions:

Time Base

The reference timing interval used by timers, dictating how the timer increments or decrements time counts.

Retentive On-relay Timer

A timer that retains its accumulated value even when the control power is interrupted, resuming its timing function once power is restored.

Power Loss

The interruption or failure of electrical power supply, affecting the operation of devices, systems, and entire facilities, requiring mitigation strategies.