A thermodynamic system is taken from an original state to an intermediate state by the linear process shown in Figure.

Its volume is then reduced to the original value from E to F by an isobaric process. Calculate the total work done by the gas from D to E to F

Asked by Abhisek | 1 year ago | 177

Total work done by the gas from D to E to F = Area of ∆DEF

Area of ∆DEF = (\( \dfrac{1}{2}\)) x DE x EF

Where,

DF = Change in pressure

= \( \dfrac{ 600 N}{m^2}\) – \( \dfrac{300N}{m^2}\)

We get,

= \( \dfrac{300N}{m^2}\)

FE = Change in volume

= 5.0 m^{3} – 2.0 m^{3}

We get,

= 3.0 m^{3}

Area of ∆DEF = (\( \dfrac{1}{2}\)) x 300 x 3

On further calculation, we get,

= 450 J

Hence, the total work done by the gas from D to E to F is 450 J

Answered by Pragya Singh | 1 year agoA refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36°C , calculate the coefficient of performance.

An electric heater supplies heat to a system at a rate of 100W. If system performs work at a rate of 75 joules per second. At what rate is the internal energy increasing?

A steam engine delivers 5.4×10^{8} J of work per minute and services 3.6 × 10^{9} J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following:

**(a)** What is the final pressure of the gas in A and B?

**(b)** What is the change in internal energy of the gas?

**(c)** What is the change in the temperature of the gas?

**(d)** Do the intermediate states of the system (before settling to the final equilibrium state) lie on its P-V-T surface?

In changing the state of a gas adiabatically from an equilibrium state A to another equilibrium state B, an amount of work equal to 22.3 J is done on the system. If the gas is taken from state A to B via a process in which the net heat absorbed by the system is 9.35 cal, how much is the net work done by the system in the latter case? (Take 1 cal = 4.19 J)