Question

Heat flows from a reservoir at 800 k to another reservoir at 250 k. If entropy change of the hot reservoir is 4 kj/k, determine the entropy change of the cold reservoir

Answer 1

I don't know your answer

Answer 2

Answer:

12.8kj/K

Explanation:

the hot reservoir loses an energy Q by heat that causes a change in its entropy

ΔSh= -Q/Th     (1)

ΔSh=entropy of the hot reservoir

Th = temperature of the hot reservoir

the cold reservoir absorbs an amount of energy Q by heat released from the hot reservoir

ΔSc=Q/Tc          (2)

ΔSc=entropy of the cold reservoir

Tc=temperature of the cold reservoir

by taking the ratio of equations 1 and 2,

4/ΔSc=250K/800K

ΔSc=4 x 800/250=12.8kj/K