# Thermodynamic constant volume process

## Homework Statement

In a constant-volume process, 208 J of energy is transferred by heat to 0.99 mol of an ideal monatomic gas initially at 290 K.
(a) Find the work done on the gas.

(b) Find the increase in internal energy of the gas.

(c) Find its final temperature.

I just don't know which equation to use and don't really know which direction to take.

## Homework Equations

Pretty sure it involves ΔU=W+Q

## The Attempt at a Solution

NIL

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Simon Bridge
Homework Helper
Start by drawing a PV diagram of the process.

The work done is the area under the P-V curve.
The equations you want are the ideal gas law, something to relate internal energy to work and heat, and something to relate change in internal energy to temperature in a constant volume process.

Andrew Mason
Homework Helper

## Homework Statement

In a constant-volume process, 208 J of energy is transferred by heat to 0.99 mol of an ideal monatomic gas initially at 290 K.
(a) Find the work done on the gas.

(b) Find the increase in internal energy of the gas.

(c) Find its final temperature.

I just don't know which equation to use and don't really know which direction to take.

## Homework Equations

Pretty sure it involves ΔU=W+Q
Is there any work done? Plug that value into your equation.

Can you find the heat flow, Q? Plug that into your equation.

That will give you the change in internal energy.

How is Q related to change in temperature? (think: heat capacity of the gas).

AM