1. The evaporation of sweat is an important mechanism for temperature control in some warm-blooded animals.

a) What mass of water must evaporate from the skin of an 80.0 kg man to cool his body 2oC? The heat of vaporization of water at body temperature (37oC) is 2.42106 J/kg. The specific heat of a typical human body is 3480 J/(kgK).

b) What volume of water (in cm3) must the man drink to replenish half of the evaporated water?

2. Oxygen (O2) has a molar mass of 32.0 g/mol.

a) What is the root-mean-square speed of an oxygen molecule at a temperature of 30oC?

b) What is its average translational kinetic energy at that speed?

please help!