Monday

October 20, 2014

October 20, 2014

Posted by **Mary** on Saturday, April 21, 2007 at 1:23am.

Let L be the original length of the cylinder of air. (You don't need to know it; it will cancel out). For a monatomic gas, Cp = (5/2)R, where R is the molar gas constant and Cp is the specific heat at constant pressure. This is a constant pressure heat transfer process.

The temperature change is

delta T = Q/(n Cp), and n = PV/RT

n is the number of moles. This leads to

delta T = (2/5) T/(PAL)

For the movement delta X of the piston, use the energy equation

Work = P A *delta X = Q - delta U

where delta U = Cv * delta T

and Cv = (3/2)RT (for a monatomic gas).

I get

delta X = (2/5) Q/(PA)

In your case, delta Q is -2109 J

Check my logic

**Answer this Question**

**Related Questions**

Physics - Suppose a monatomic ideal gas is contained within a vertical cylinder ...

Physics - Suppose a monatomic ideal gas is contained within a vertical cylinder ...

Physics HELP!!!!!!!! - Suppose a monatomic ideal gas is contained within a ...

Physics, still don't get it! - Suppose a monatomic ideal gas is contained within...

Physics- drwls please check - Good morning. This is a repost. The system is ...

Physics repost please check - Good morning. This is a repost. The system is ...

physics - A movable piston having a mass of 8.00 kg and a cross-sectional area ...

Physics - A movable piston having a mass of 7.26 kg and a cross-sectional area ...

physics help please... - A movable piston having a mass of 8.00 kg and a cross-...

Physics - 2 moles of ideal gas are in a cylinder container with cross-sectional ...