Gas Laws
Convert 1.975 atm to torr
1501 torr
Which intermolecular force is always present?
London Dispersion Forces
Is the total distance traveled when John climbs a mountain a state or path function?
path function
Is burning a candle endothermic or exothermic?
Exothermic
A system loses 642 kJ of heat to the surroundings, resulting in a change in internal energy of the system equal to -134 kJ. How much work is done and is it done on or by the system?
+508 kJ
Work is done on the system
A 50.0 ml soap bubble is blown in a 27.0°C room. It drifts out an open window and lands in a snow bank at -3.0°C. What is its new volume?
45 mL
Which molecules can form hydrogen bonds?
CH4, CH3OH, SH2, HF
CH3OH and HF
What is transferred in a closed, open, and isolated system?
Closed: heat
Open: mass and heat
Isolated: nothing (energy barrier)
The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 3.54g of water boils at atmospheric pressure?
7.99 kJ
To what pressure must a gas be compressed in order to get into a 3.00 cubic foot tank the entire weight of a gas that occupies 400.0 cu. ft. at standard pressure?
133 atm
You have a sample of gas with a pressure of 1.86 atm, volume of 4.33 L, and temperature of 26.5 °C. If you cool it to 12.7 °C and decrease the volume to 3.45 L, what will the pressure be?
2.23 atm
Name the strongest intermolecular force present between SO2 and H2O molecules
dipole-dipole
A system does 566 kJ of work and gains 236 kJ of heat. What is the change in internal energy
-330. kJ
The enthalpy of condensation of ethanol is -42 kJ/mol at 20 °C, and the enthalpy of freezing is -5 kJ/mol at the same temperature. What is the enthalpy of deposition of ethanol at that temperature?
-47 kJ/mol
A sample of F2 gas at 750C and 1.08 atm is stored in a 1.95 L flask. What is the density of the gas?
1.4 g/L
Determine the volume occupied by 2.34 grams of carbon dioxide gas at STP
1.19 L
Name all intermolecular forces present if the following molecules are mixed together:
Mg2+ and H2O
LDFs, Ion-Dipole, Dipole-Dipole, Hydrogen bonding
A chemical reaction is performed in a flask that is sealed with a movable piston. The initial volume of the system is 741 mL and the final volume of the system is 329 mL.The pressure remains constant at 1.00 atm. Calculate the work, in joules, performed during the reaction.
-41.7 J
The specific heat of a cooking oil is 0.418 J/g0C. How much heat energy is needed to raise the temperature of 1.642 kg of this oil from 26.00C to 43.00C?
11.7 kJ
The pressure of a gas is reduced to 75% of its initial value and the volume is increased by 40% of its initial value. Find the final temperature, given that the initial temperature was −10 °C
3 0C
At 1.19 atm and 21.8 0C, a 3.78g sample of gas occupies a volume of 1840 mL. Calculate the molar mass of the gas.
41.8 g/mol
Rank the following in terms of increasing boiling point:
CH3CH2OCH2CH3
CH3CH2CH2CH3
CH3CH2OCH3
CH3CH2CH3
CH3CH2CH3
CH3CH2CH2CH3
CH3CH2OCH3
CH3CH2OCH2CH3
A sample of gas occupies a volume of 62.1 mL. As it expands, it does 135.1 J of work on its surroundings at a constant pressure of 783 Torr. What is the final volume of the gas?
1.36 L
A 0.409 mol sample of CO2 (g), initially at 273K and 1.00 atm, is held at constant pressure while enough heat is applied to raise the temperature of the gas by 15.7K. Calculate the amount of heat required to bring about the temperature change. (Assume the constant-pressure molar specific heat is equal to 7R/2)
187 J
A 2.00 mol sample of nitrogen gas (N₂) is contained in a cylinder at 2.00 atm and 300 K. The gas is then compressed isothermally and reversibly until its volume is reduced to 50% of its initial volume. Determine the values of work (w) and heat transfer (q),
w = 3.46 kJ
q = - 3.46 kJ