A.) In exercising, a weight lifter loses 0.123 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. The work done in lifting weights is 1.45E+5 J. Assuming that the latent heat of vaporization of perspiration is 2.43E+6 J/kg, find the change in the internal energy of the weight lifter.
B.) A gas, while expanding under isobaric conditions, does 484 J of work. The pressure of the gas is 1.67E+5 Pa, and its initial volume is 1.38E-3 m3. What is the final volume of the gas?