When food is cooked in a vessel by keeping the lid closed, after some time the steam pushes the lid outward. By considering the steam as a thermodynamic system, then in the cooking process
A. Q > 0, W > 0,
B. Q < 0, W > 0,
C. Q > 0, W < 0,
D. Q < 0, W < 0,
Answer:A
When food is cooked in a vessel by keeping the lid closed, after some time the steam pushes the lid outward. By considering the steam as a thermodynamic system, then in the cooking process
A. Q > 0, W > 0, B. Q < 0, W > 0, C. Q > 0, W < 0, D. Q < 0, W < 0,