Calculate the temperature at which air possesses density equally to that of Hydrogen at 0°C.Density of air at NTP: 14.4.

(6) (2 points) Calculate the change in the molar Gibbs energy for ice at -10°c, with fixed density 917 kg m 3, when the pressure is increased from 1.0 bar to 2.0 bar. (7) (2 points) Calculate the temperature where ΔG=0 for the reaction we observed in class 2 NO2 N204 Extra credit: Calculate the temperature where the ΔG=0 for the reaction we will (eventually) observe in class: H2 + ½ O2 → H2O

2. Hydrogen gas was collected over water as shown in the diagram below. Calculate the pressure of the Hydrogen gas collected. Water temperature was 23.0 degree C and the atmospheric pressure was 741.0 mmHg. (Hint the density of Mercury is 13.6 g/mL)