Standard Science Primary 5 Cycles

Study the diagram showing state changes. Which process involves a loss of heat?

A Arrow S (Liquid to Gas)
B Arrow Q (Liquid to Gas)
C Arrow P (Solid to Liquid)
D Arrow R (Gas to Liquid)
Show Worked Solution

Worked Solution

Step 1: Identify the processes. Melting (Solid to Liquid) and Boiling/Evaporation (Liquid to Gas) require heat gain. Step 2: Condensation (Gas to Liquid) and Freezing (Liquid to Solid) occur when heat is lost to the surroundings. Step 3: Arrow R represents condensation, which is a heat loss process.

Correct answer: Arrow R (Gas to Liquid)

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