Which symbol is commonly used to denote heat in thermodynamics?

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Multiple Choice

Which symbol is commonly used to denote heat in thermodynamics?

Explanation:
Heat is energy in transit due to a temperature difference between a system and its surroundings, and in thermodynamics its transfer is denoted by the symbol q. This distinguishes it from other related quantities: work is represented by w, the system’s energy content by U, and temperature by T (a property of the system, not a transfer). In the common first-law form ΔU = q + w, q is positive when heat flows into the system and negative when it leaves. So the symbol used for heat is q.

Heat is energy in transit due to a temperature difference between a system and its surroundings, and in thermodynamics its transfer is denoted by the symbol q. This distinguishes it from other related quantities: work is represented by w, the system’s energy content by U, and temperature by T (a property of the system, not a transfer). In the common first-law form ΔU = q + w, q is positive when heat flows into the system and negative when it leaves. So the symbol used for heat is q.

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