Answer:
5000J
Explanation:
Given in the question that
Heat added to the coffee cup is, ΔS = 20 J/K
The temperature of the coffee, T = 250 K
Now, using the formula for the entropy change
...........(1)
Where,
ΔS is the entropy change
ΔH is the enthalpy change
T is the temperature of the system
substituting the values in the equation (1)
we get

ΔH=250×20
ΔH=5000 J
JUST PUT THE BRICK ON THE OTHER
Answer:
a)
, b) 
Explanation:
a) The ideal Coefficient of Performance for the heat pump is:



The reversible work input is:



b) The irreversibility is given by the difference between real work and ideal work inputs:


Answer:
im not sure but kermeen looks like he has a good answer u can give him brainilest
Explanation: