What do you mean by isothermal process. Derive relation to find work done by gas expanded from pressure ′P1′ to ′P2′ at constant temperature ′T′. If 5 moles of gas at 1 atm is expanded from 50 lite...
A thermodynamic process in which the temperature of the system remains constant is defined as isothermal process.
Work done by Gas from P1 to P2 at Constant Temperature
If 5 moles of gas at 1 atm is expanded from50 liter from 5 liter at constant temperature of 20 C. find the work done by the gas.
Solution:
n = 5
P1 = 1 atm
V1 = 50 liter
V2 = 5 liter
T = 20oC = (273 + 20) K = 293 K
At constant temperature,
Work done = nRT ln(V2/V1)
= (5 * 8.314 * 293) ln(5/50)
= - 28 kJ
The negative sign indicates that the...