A container with rigid walls is filled with 4.0 mol of air with Cv=2.5R Then the temperature is increased from 17 degrees C to 354 degrees C What is the change in internal energy? Let the ideal-gas constant R = 8.314 J / (mol • K). 337 J

28,000 J

7000 J

2800 J

Question

Physics

Selina Summers

14 August, 04:00

A container with rigid walls is filled with 4.0 mol of air with Cv=2.5R Then the temperature is increased from 17 degrees C to 354 degrees C What is the change in internal energy? Let the ideal-gas constant R = 8.314 J / (mol • K). 337 J

28,000 J

7000 J

2800 J

+2

Answers (1)

Know the Answer?

Joanna Walsh · Answer 1

Internal energy = heat + work

U = Q + W

Since there's no change in volume (rigid walls), W = 0.

U = Q

U = n Cᵥ ΔT

U = (4.0 mol) (2.5 * 8.314 J/mol/K) (354 C - 17 C)

U = 28,000 J

A container with rigid walls is filled with 4.0 mol of air with Cv=2.5R Then the temperature is increased from 17 degrees C to 354 degrees C What is the change in internal energy? Let the ideal-gas constant R = 8.314 J / (mol • K). 337 J28,000 J7000 J2800 J

A container with rigid walls is filled with 4.0 mol of air with Cv=2.5R Then the temperature is increased from 17 degrees C to 354 degrees C What is the change in internal energy? Let the ideal-gas constant R = 8.314 J / (mol • K). 337 J

28,000 J

7000 J

2800 J