# Internal energy

"What is the internal energy of 10 moles of helium at 100 K?"

The same question is asked about 10 moles of oxygen. I’m going to guess PV=nRT which would give 8,314 J as the PV value. Because (at least in chemistry this is true) delta H = delat E +/- work and work = PV, so PV would somehow resemble "internal energy." The answer given is 12,473 J which is 3/2 of the calculation. I know I am on the right track but it would be helpful if someone could just throw it together for me. Thanks

The same question is asked about 10 moles of oxygen. I’m going to guess PV=nRT which would give 8,314 J as the PV value. Because (at least in chemistry this is true) delta H = delat E +/- work and work = PV, so PV would somehow resemble "internal energy." The answer given is 12,473 J which is 3/2 of the calculation. I know I am on the right track but it would be helpful if someone could just throw it together for me. Thanks

http://ift.tt/1i5tXVd

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