SCE FE Mechanical Practice Questions - Saudi Council Of Engineers Fundamentals Of Engineering (FE) - Mechanical Exam

According to the first law of thermodynamics for a closed system undergoing a process, which expression is correct?

ΔU = Q − W (sign convention: heat in positive, work out positive) ΔU = Q + W for all thermodynamic sign conventions Q = W for any adiabatic process ΔU = 0 for any isothermal ideal gas process

Correct Answer:

ΔU = Q − W (sign convention: heat in positive, work out positive)

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