Ideal Gas Law
What pressure will 0.052 kg of O2 gas exert in a 3750mL container at 60oC?
molar mass of O2= 32g
11.8atm
What are the general trends of solubility of solids and gases as temperature increases?
- solubility of solids generally increase with an increase in temperature
- solubility of gases generally decrease with an increase in temperature.
What about increases of pressure and gases?
Name all exothermic processes in the water phase change diagram.
freezing, condensation, deposition
Which of the following will produce the largest boiling point elevation?
a. 3.0m Mg(NO3)2
b. 3.0m FePO4
c. 3.0m Na3PO4
d. 3.0m AgNO3
c
What volume will a sample of CO gas occupy in a syringe at 40oC, if the CO gas has a volume of 375.0mL at 70oC?
0.342L
Name the forces (intermolecular or intramolecular)of the following pair of substances and if they are likely to form a homogeneous solution.
1. NH3 and CH3CH2COOH
2. C3H7OH and C2H6
3. C4H10 and NaCl
1. all three; homogeneous
2. all three and LDF; heterogeneous
3. LDF and ionic; heterogeneous
A negative slope for a region of a heating curve indicates that ___________ in that region.
energy is being released by the system and is causing a decrease in temperature.
Which of the following will cause the pressure of an ideal gas to triple in value?
a.Increasing the temperature from 25oC to 75oC.
b.Increasing the volume by a factor of 3 at constant temperature.
c.Increasing the absolute temperature by a factor of 3 while increasing the volume by a factor of 3.
d.Lowering the volume by a factor of 3 at constant temperature.
d
Determine the density of carbon dioxide, CO2 gas at 742 mmHg and 45oC?
What is the mole fraction of benzene if a solution contains 138.21g of benzene and 230.35g of toluene?
molar mass of benzene: 78.11g/mol
molar mass of toluene: 92.14g/mol
0.4144
Place the following in order of increasing vapor pressure.
CO
NH3
N2
NH3 < CO < N2
Which of the following can you obtain from a Clausius-Clapeyron equation and plot of ln(p) vs 1/T, y-axis vs x-axis respectively? more than 1 answer
a. the enthalpy of vaporization
b. the thermodynamics of the process
c. the specific heat capacity
d. vapor pressure at a certain temperature
What is a and d?
The density of a gas is 1.79 g/L at 23oC and 750.12 mmHg. What is the molar mass of the gas?
44.0 g/mol
A solution was created dissolving 122g of glucose in 150mL of water. What is the expected vapor pressure of the solution at 25oC if the vapor pressure of water at 25oC is 22.77 torr?
molar mass of glucose: 180.16 g/mol
21.05 torr
What is the new boiling point of a 0.50m solution of Mg3(PO4)2 in water? Kb of water is 0.512oC/m.
molar mass of H2O : 18.01 g/mol
molar mass of Mg3(PO4)2 : 262.85 g/mol
101.28oC
A solution is 1.50m KI in water. What is the weight percentage of KI in the solution?
molar mass of water: 18g/mol
molar mass of KI: 166g/mol
19.9%
Determine the volume of CO2 at STP formed when 65g of C3H8 and 283g of O2 decomposes according to the following reaction.
C3H8: 44.1g/mol O2: 32g/mol.
C3H8(g) + 5O2(g) --> 3CO2(g) + 4H2O(g)
99.1L
The pressure inside a soda bottle is 1900mmHg. If 1/3 of the pressure is generated by CO2, what is the solubility of CO2 in a 2L bottle of coke at 25oC? Henry's law constant for CO2 at 25oC is 3.1x10-2 M/atm.
0.0258M or 0.0258mol/L
What is the new freezing point of a 80.0g of Mg3(PO4)2 dissolved in 140mL of water? Kf of water is 1.86oC/m.
molar mass of H2O : 18.01 g/mol
molar mass of Mg3(PO4)2 : 262.85 g/mol
-20.22oC
A scientist is given 500.5g of a 0.8500m solution of dissolved sodium chloride in water. How many grams of NaCl (58.44g/mol) are in that solution?
24.86g