QUESTION 4A gas cylinder contains 6Â´1023 of gas molecules, each of mass1Â´10-25kg . Assume that
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QUESTION 4 A gas cylinder contains 6Â´1023 of gas molecules, each of mass1Â´10-25kg . Assume that the average speed of the molecules is 900 ms-1. The molecules now strike a small portion of the gas container wall of area 2 cm2 every second at an angle of 45o to the wall. What is the pressure exerted on this portion of the wall by the gas molecules?
QUESTION 5 A fixed amount of an ideal gas occupies a volume of 4cm3 at constant pressure. The gas is now heated so that the root-mean square speed of its molecules is tripled. What is the new volume of the gas?
QUESTION 1 Calculate the amount of heat that must be removed from 100g of mercury, initially existing as vapour at 635 K, in order to completely solidify it. Use the information below: Melting point of mercury =234K Boiling point of mercury =635K Specific heat capacity of mercury = 140 Jkg-1K-1 Heat of fusion of mercury = 11.4 kJ kg-1 Heat of vapourization of mercury = 296 kJ kg-1
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