Question

what are the sign conventions used for q and z ​

Answer 1

Answer:

Heat absorbed by the system = q+ (positive)

Heat evolved by the system = q− (negative)

Work done on the system = w+ (positive)

Work done by the system = w− (negative)

hope it helps you

have a great day ahead

Answer 2

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I use the sign convention:

• Heat absorbed by the system = q+ (positive)
• Heat evolved by the system = q− (negative)
• Work done on the system = w+ (positive)
• Work done by the system = w− (negative)