Q. 57

Expert-verifiedFound in: Page 597

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

FIGURE P shows the cycle for a heat engine that uses a gas having .The initial temperature is , and this engine operates at cycles per second.

a. What is the power output of the engine?

b. What is the engine's thermal efficiency?

a. The power output of the engine is .

b. The engines thermal efficiency is .

Using the ideal gas equation, calculate the number of moles in the gas. Find the temperatures and pressures at each stage of the cycle later.

Now, knowing all of the parameters at point one in the cycle, the formula for the number of moles of gas is,

n = P_{1}V_{1} / RT

Where,

P_{1} = pressure at point one,

V1 = volume at point one,

R = universal gas constant,

T = absolute temperature of the gas at point 1 .

Substitute P_{1 }= 1 atm , V_{1} = 600 cm^{3} , R = 8.31 J/mol.K and T = 300 K

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