Thermodynamic Cycles
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Suppose a cycle started at the red ball, and the cycle will end up at the red ball. Which variable will equal zero?
?
ΔU
by the gas
?
Q
by the surroundings
?
W
by the surroundings
What sign is the net work
by the surroundings
for this cycle?
?
Positive
?
Negative
?
Zero
What is the sign of Q
by the surroundings
for this cycle?
?
Positive
?
Negative
?
Zero
OK