2 A 1.0 mol sample of He (9) at 25°C is mixed with a 1.0 mol sample of Xe (9) at 50'C. Which of the
following correctly predicts the changes in average kinetic energy and the aXekale speed of
the atoms that will occur as the mixture approaches thermal equilibrium?

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]