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assignment 1

# assignment 1 - CHEM 2040U-W2011 ASSIGNMENT#1 DUE FEBRUARY...

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1 CHEM 2040U-W2011- ASSIGNMENT #1 DUE: FEBRUARY 2 nd (Lecture Class) INSTRUCTORS: Dr. Liliana Trevani / Mr. Shumail Kamal Problem #1 A mixture of hydrogen and ammonia has a volume of 153.2 cm 3 at 0.00 o C and 1 atm. The mixture is cooled to the temperature of liquid nitrogen at which ammonia freezes out and the remaining gas is removed from the vessel. Upon warming the vessel to 0.00 o C and 1 atm, the volume is 98.7 cm 3 . Calculate the mole fraction of ammonia in the original mixture. Problem #2 Liquid nitrogen has a density of 875.4 kg.m -3 L at its normal boiling point. What volume does a balloon occupy at 22.4 o C and a pressure of 1.00 atm if 2.75x10 -3 L of liquid nitrogen is inject to it? Assume that there is no pressure difference between the inside and outside of the balloon.

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