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what is internal energy
the sum of kinetic energy and potential energy of random motion of molecules in a system
what does a change in temperature do to internal energy
an increase in temperature increases the kinetic energy of a system and therefore increases the internal energy
formula for work done on the gas
W = p Δ V
sign differences in work done on gas
work done on gas: compressed (+W)
work done by gas: expands (-W)
formula for first law of thermodynamics
ΔU = q + W ; ΔU is change in internal energy, q is heating of the system, and W is work done on the gas
