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Chapter 7
Chapter 8
Chapter 7
Chapter 8
Chapter 7
100
Breaking Bonds requires heat is described as a a) Endothermic Reaction b) Exothermic Reaction
What is a) Endothermic Reaction
100
Three gases are mixed in a 1.00 Liter container. The partial pressure of Carbon dioxide is 250.0 torr, that of Nitrogen is 375.0 torr and that of Helium is 137.0 torr. What is the pressure of mixture of gases?
What is 762.0 torr
100
Enthalpy is signified with the symbol: a) Delta S b) Delta H c) Delta G
What is b) Delta H
100
Calculate the final pressure in the cylinder of a car engine if the original volume is 450 mL at a pressure of 8.1 atm and the final pressure is 120 mL. Assume no change in the number of molecules or temperature.
What is 30 atm
100
A reaction that once started goes until completion without any external influence is considered a) Endergonic b) Endothermic c) Exothermic d) Spontaneous d) Non spontaneous
What is d) Spontaneous
200
A spontaneous reaction has a a) neg. Delta H b) pos. Delta H c) neg. Delta G d) pos. Delta G e) neg. Delta S f) pos. Delta S
What is c) neg. Delta G
200
Calculate the number of moles of oxygen in a 12.5 L tank at a pressure of 25 atm, measured at 22 degrees Celsius
What is 12.9 moles
200
According to the equation: 2 CH₃OH (l) + 3O₂ (g) → 2CO₂ (g) + 4H₂O (l) + 1750.0 kJ what amount of heat is evolved in burning 1.00g of alcohol?
What is 27.2 kJ
200
At what temperature (in Celsius) will 0.505 mol of Carbon Dioxide, at a pressure of 4.30 atm, occupy a volume of 3.5 L?
What is 90 degrees Celsius
200
a catalyzed reaction releases or absorbs the a) SAME b) LESS c) MORE energy than an uncatalyzed reaction
What is a) SAME
300
Write the equilibrium constant for the following reaction: PCl₅ (g) ↔ PCl₃ (l) + Cl₂ (g)
What is Keq = [Cl₂]^3 [PCl₅]^3
300
Calculate the volume that 2.25 mol of gas occupy at STP
What is 50.4 L
300
Given the equation: N₂ (g) + 2O₂ (g) ↔ 2NO₂ (g) There are 1.25x10^-3 mol/L of Nitrogen, 2.50x10^-3 mol/L of Oxygen, and 6.20x10^-4 mol/L of NO₂. What is the "K" for this reaction?
What is 49.2
300
If the temperature of a 1.75 L sample of gas in changed from 30.0 degrees Celsius to 20.0 degrees Celsius, what will be the new volume?
What is 1.69 L
300
Given the reaction, 2SO₃ (g) ↔ 2SO₂ (g) + O₂ (g) Increasing the external pressure will cause a shift to the a) RIGHT b) LEFT c) NO CHANGE
What is b) LEFT
400
Is this equation: 2H₂ (g) + O₂ (g) → 2H₂O (l) a) Endothermic with a +ΔS b) Endothermic with a -ΔS c) Exothermic with a +ΔS d) Exothermic with a -ΔS
What is d) Exothermic with a -ΔS
400
Calculate the number of molecules of Carbon Dioxide contained in 62.5 L if this gas is measured in STP
What is 1.69x10^24 molecules of Carbon Dioxide
400
This reaction is 6CO₂(g) + 6H₂O(l) → C₆H₁₂O₆(g) + 6O₂(g) ΔH = +2519 kJ a) Spontaneous at all temperatures b) Non spontaneous at all temperatures c) Spontaneous only at low temps d) Spontaneous only at high temps
What is d) Spontaneous only at high temperatures
400
The volume of gas inside a piston started at 125 mL and then was heated until the volume rose by 725 mL. If the temperature inside the piston was originally 15 degrees Celsius, calculate the new temperature in degrees Celsius, assuming that the amount of gas and pressure do not change.
What is 1.68x10^3 degrees Celsius
400
according to Le Chatelier's principle, decreasing the temperature will shift the following reaction to the: 2 CH₃OH (l) + 3O₂ (g) ↔ 2CO₂ (g) + 4H₂O (l) + 1750.0 kJ a) Right b) Left c) No change
What is a) Right
500
This equation is: NH₂CONH₂ (g) + H₂O (l) → 2 NH₃ (g) + CO₂ (g) ΔH= -431kJ a) Endothermic with a decrease in entropy b) Endothermic with an increase in entropy c) Exothermic with an increase in entropy d) Exothermic with a decrease in entropy
What is c) Exothermic with an increase in entropy
500
The volume of a balloon is 340 mL at a pressure of 142 mmHg and a temperature of 25 degrees Celsius. Calculate the new volume in milliliters if the temperature is raised to 85 degrees Celsius and the pressure changes to 182 mmHg.
What is 319 mL
500
All of the following statements regarding the symbol ΔG are true except: a) It refers to the free energy of a reaction b) it allows us to predict the spontaneity of a reaction c) it allows us to identify an exothermic reaction d) it allows us to identify an endergonic reaction e) it describes the effect of both enthalpy and entropy on a reaction
What is c) it allows us to identify an exothermic reaction
500
A 250 mL sample of gas at 1.00 atm and 20.0 degrees Celsius has the temperature increased to 40.0 degrees Celsius and the volume increased to 500 mL. What is the new pressure in torr?
What is 406 torr
500
Which change to this reaction system would cause the equilibrium to shift to the right? N₂ (g) + 3H₂ (g) ↔ 2 NH₃ (g) + heat a) Addition of a catalyst b) Addition of NH₃ (g) c) Removal of H₂ (g) d) Heating the system e) Decreasing the volume f) Decreasing the Pressure
What is e) Decreasing the Volume