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