- #1

joemama69

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## Homework Statement

0.20 moles of a monatomic ideal gas is initially at a temperature of –23 0C.

Call this state “A.” The gas is now compressed slowly and adiabatically to

state “B” in which it has one third of its initial volume. Next it is isothermally

expanded back to its initial volume in state “C.” Finally it undergoes a

constant volume process that returns it to its initial state.

a) Sketch this cyclic process with reasonable care on a PV diagram and

label the three states—A, B, and C.

b) Show that the temperature of state B is 247 0C.

c) Find the heat input to the gas along each leg of the cycle—QAB, QBC,

and QCA. [Note: Use the result of part b whether or not you got it!]

d) Use the results of part c) and the first law of thermodynamics to find the

net work done by the gas around the entire cycle.

## Homework Equations

## The Attempt at a Solution

Part A) Note the attachment. Its a little crude but the two lines (ab) & (bc) are suppose to nice curves

Part B) I'm not really sure what forumla to use here. Because the temp changes I know i cant use and of the PV formulas. Heres what I know...

T_o = 250 Kelvin, T = 520 Kelvin, V = 1/3 V_o, Q = 0