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A glass of water is at room temperature in an isolated system. What will happen if one ice cube is added to the system?

A.
Heat will be removed from the system, causing the liquid water to lose some molecular motion but retain its state.

B.
Heat will be removed from the system, causing the liquid water to lose some molecular motion and change state.

C.
Heat will be added to the system, causing the liquid water to gain some molecular motion but retain its state.

D.
Heat will be added to the system, causing the liquid water to gain some molecular motion and change state.

1 answer

When an ice cube is added to a glass of water at room temperature, heat will be transferred from the liquid water to the ice cube. This process involves the absorption of heat by the ice to cause it to melt. The ice cube will absorb heat from the water, causing the temperature of the liquid water to decrease, and it may also lead to some melting of the ice.

Given the options provided, the correct answer is:

B. Heat will be removed from the system, causing the liquid water to lose some molecular motion and change state.

This option correctly reflects that heat is removed from the liquid water to melt the ice cube and that the temperature of the liquid water decreases as it loses heat.