I really need to get these two questions right, so any help would be much apprec

Question

I really need to get these two questions right, so any help would be much appreciated :)

1. What accounts for an increase in the temperature of a gas that is kept at constant volume? (1 point)

Energy has been removed as heat from the gas.
Energy has been added as heat to the gas.
Energy has been removed as work done by the gas.
Energy has been added as work done on the gas.


2. When an ideal gas does positive work on its surroundings, which of the gas’s quantities increases? (1 point)

temperature
volume
pressure
internal energy

Explanation / Answer

(1) According to 1st law of thermodynamics,

dQ = du + dw

at constant volume,dW = 0 then the heat given to a system is stored in potential energy.

Ans: Energy has been added as heat to the gas.

(2) the workdone on surroundings, w = Pdv

the volume of the gas is increases.

Ans: volume

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