3 - Intermolecular Forces and Properties
3 - Intermolecular Forces and Properties
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Full worked out solutions to the all problems below with explanations available here with 🔐 CHEMDUNN access.
A sample of helium gas occupies 12.4 L at 23°C and 0.956 atm. What volume will it occupy at 1.20 atm assuming that the temperature stays constant?
Suppose a balloon containing 1.30 L of air at 24.7°C is placed into a beaker containing liquid nitrogen at –78.5°C. What will the volume of the sample of air become (at constant pressure)?
If 2.45 mol of argon gas occupies a volume of 89.0 L, what volume will 2.10 mol of argon occupy under the same conditions of temperature and pressure?
(a) What is the pressure in a 304.0 L tank that contains 5.670 kg of helium at 25°C?
(b) At what temperature (in °C) does 121 mL of CO2 at 27°C and 1.05 atm occupy a volume of 293 mL at a pressure of 1.40 atm?
A sample of oxygen gas has a volume of 2.50 L at STP. How many grams of O2 are present?
A sample of methane gas having a volume of 2.80 L at 25°C and 1.65 atm was mixed with a sample of oxygen gas having a volume of 35.0 L at 31°C and 1.25 atm. The mixture was then ignited to form carbon dioxide and water. Calculate the volume of CO2 formed at a pressure of 2.50 atm and a temperature of 125°C
At STP: What is the density of F2 at STP (in g/L)?
Non-STP: What is the density of N2 at 1.3 atm and 101°C?
Consider the an apparatus that in is made of two containers that are joined together with a valve in the middle. When the valve is open, the gas on either side can freely mixed with each other. Initially, on the left side which is a 9.00 L container contains helium at 45°C and the pressure is 2.00 atm. The valve is closed. The right is a 3.00 L container containing helium at 45°C with a pressure of 3.00 atm. After the valve is opened, what is the pressure of the helium gas?
Calculate the root mean square velocity for the atoms in the sample of helium gas at 25°C.
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