Homework Help: heat

Posted by heather on Tuesday, July 11, 2006 at 7:28pm.

20 cubic inches of a gas with an absolute pressure of 5 psi is compressed untill its pressure reaches 10 psi. what is the new volume of the gas? ( assuming that there s no change in temperture)

a. 5 cubic inches
b. 10 cubic inces
c. 40 cubic inches
d. 100 cubic inches

thanks to any one who can answer this

When there is no change in temperature, the product PV does not change.
20 in^3 * 5 psi = 10 psi * X psi
X = (5/10) * 20 in^3 = ?

P1V1 = P2V2
You have V1, P1, and P2. Solve for V2. Show your work if you need further assistance.

20 in^3 * 5 psi = 10 psi * X in^3
X = (5/10) * 20 in^3
= 10 cubic inches (b)

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