OUNT OF HEAT ABSORBED AND WORK DONE IN A PV DIAGRAM?

[paradiselost5]

Homework Statement

One mole of a dilute gas initially has a pressure equal to 1.00 atm, and a volume equal to 14.0 L. As the gas is slowly heated, the plot of its state on a PV diagram moves in a straight line to the final state. The gas now has a pressure equal to 2.00 atm, and a volume equal to 78.0 L.

(a) Find the work done by the gas.


(b) Find the heat absorbed by the gas.

Homework Equations

The Attempt at a Solution

I took the area under the PV curve which is a triangle... 64/2*101.325

 

[ehild]

The Attempt at a Solution

I took the area under the PV curve which is a triangle... 64/2*101.325

Watch out: It is not a triangle. The work done by the gas is the area under the PV curve down to P=0.

ehild

 

[Andrew Mason]

In addition to what ehild points out, watch the units for volume. If you are using MKS units you have to convert litres to _________.

What is the relationship between work done, heat flow and change in internal energy? To find the heat flow, what other quantity do you have to find? (hint: what is the change in temperature?).

AM