The atmospheric pressure reaches 76 cm Hg at sea level. If the atmosphere pressure
decreases approximately 10 mm Hg as we rise up 120 m above sea level, the height of
a hill which the reading of mercury barometer at its top was 70 cm Hg 1S *
(a) 520 m.
b 680 m.
© 720 m.
d) 800 m.

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?