Problem: The air within a piston equipped with a cylinder absorbs 565 J of heat and expands from an initial volume of 0.12 L to a final volume of 0.86 L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston?

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E=q+w

where w is work; and q is the heat release or absorb

w=-PV

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Problem Details

The air within a piston equipped with a cylinder absorbs 565 J of heat and expands from an initial volume of 0.12 L to a final volume of 0.86 L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston?

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