An ideal gas in a piston is placed in a refrigerator, which removes 413 J of energy from the gas via cooling. The plunger on the piston is pushed down, which does 70 J of work on the gas.

1)

What is the net change in the internal energy of the gas in the piston?

Question

Physics

Stich

23 February, 10:17

An ideal gas in a piston is placed in a refrigerator, which removes 413 J of energy from the gas via cooling. The plunger on the piston is pushed down, which does 70 J of work on the gas.

1)

What is the net change in the internal energy of the gas in the piston?

+5

Answers (1)

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Jimena Myers · Answer 1

The net change in the internal energy of the gas in the piston is - 343J

Explanation:

Because heat and workdone are the only means of energy transfer between the system and the surrounding, change in internal energy is given by;

∆E = q + w

q = heat transfer

w = workdone

Because heat is lost by the system, the heat transfer is negative

q = - 413J

Because work is done on the system, workdone is positive

w = + 70J

∆E = - 413J + 70J

∆E = - 343J

An ideal gas in a piston is placed in a refrigerator, which removes 413 J of energy from the gas via cooling. The plunger on the piston is pushed down, which does 70 J of work on the gas.1)What is the net change in the internal energy of the gas in the piston?

An ideal gas in a piston is placed in a refrigerator, which removes 413 J of energy from the gas via cooling. The plunger on the piston is pushed down, which does 70 J of work on the gas.

1)

What is the net change in the internal energy of the gas in the piston?