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-An ideal gas initially at 50ºC and pressure P1 = 100 kPa occupies a volume V1 = 3 L.It undergoes a quasistatic,isothermal expansion until its pressure is reduced to 50 kPa.How much does the internal energy of the gas change during this process? R = 8.314 J/mol·K = 8.206 L·atm/mol·K.
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