Question

A thermodynamic process is carried out from an original state D to an intermediate state E by the linear process shown in figure.

The total work is done by the gas from D to E to F is

(a) 100 J

(b) 800 J

(c) 300 J

(d) 250 J

Answer 1

Correct option (b) 800 J

Explanation :

Total work done by the gas from D to E to F is equal to the area of ΔDEF.

Here, DF = change in pressure = 600 - 200 = 400 Nm^-2

Also, EF = change in volume =7 m³ - 3 m³  = 4 m³ 

Thus, the total work done by the gas from D t E to F is 800 J