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1. Homework Statement
A thermodynamic system changes isochorically from state A to state B where the temperature is greater than state A. The system then expands isobarically to state C where the temperature is greater than state B. From state C the system returns to its original state A linearly. Select Zero, Positive, or Negative for all selections.
W C → A
Q A → B
W B → C
∆U C → A
Q B → C
∆U A → B
2. Homework Equations
∆U = Q + W
W = WORK ON GAS
Q = HEAT ADDED TO GAS
W = P∆V
3. The Attempt at a Solution
W C → A +
Q A → B +
W B → C 
∆U C → A 0
Q B → C 0
∆U A → B +
WHAT AM I DOING WRONG?
(GRAPH ATTATCHED)
A thermodynamic system changes isochorically from state A to state B where the temperature is greater than state A. The system then expands isobarically to state C where the temperature is greater than state B. From state C the system returns to its original state A linearly. Select Zero, Positive, or Negative for all selections.
W C → A
Q A → B
W B → C
∆U C → A
Q B → C
∆U A → B
2. Homework Equations
∆U = Q + W
W = WORK ON GAS
Q = HEAT ADDED TO GAS
W = P∆V
3. The Attempt at a Solution
W C → A +
Q A → B +
W B → C 
∆U C → A 0
Q B → C 0
∆U A → B +
WHAT AM I DOING WRONG?
(GRAPH ATTATCHED)
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