Problem 11.9. A heat engine performs 200J of work in each cycle and has efficiency of 20 percent. For each cycle of operation a) How much heat is absorbed and b) How much heat is expelled? Heat problem 9. Sindh Textbook Board (stb) problems. Class 12 chapter heat problems sindh textbook board.

Problem 11.9. A heat engine performs 200J of work in each cycle and has efficiency of 20 percent. For each cycle of operation a) How much heat is absorbed and b) How much heat is expelled?

Problem 11.9

A heat engine  perform 200j of works in each cycle and efficiency of 20 percent for each  cycle  of operation.

1how much heat is absorbed ?

2hhow much is exploded?

Data (a

Δw=200j

E =20%

A) q1=?

B) q2 =?

Solution

E=Δw/Q1 ×100

20/100=200/Q1

Q1= 1000j.        Answer 

(B)

Solution 

Δw=q1 -q2

200=1000 -q2

Q2= 800j ......answer