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