The standard molar enthalpy of formation of CO2(g) is equal to ( )
A. 0
B. the standard molar heat of combustion of graphite
C. the standard molar heat of combustion of CO(g)
D. the sum of the standard molar enthalpies of formation of CO(g) and O2(g)
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Under which set of conditions is DGrxn for the reaction A(g) ® B(g) most likely to be negative? ( )
A. PA = 10.0 atm; PB = 10.0 atm
B. PA = 10.0 atm; PB = 0.010 atm
C. PA = 0.010 atm; PB = 10.0 atm
D. PA = 0.010 atm; PB = 0.010 atm
The reaction, 2Cl2O(g) ® 2 Cl2(g) + O2(g) DH = -161 kJ, is expected to be ( )
A. spontaneous at all temperatures
B. spontaneous at low temperatures, but nonspontaneous at high temperatures
C. nonspontaneous at all temperatures
D. spontaneous at high temperatures only
Propionic acid, CH3CH2COOH, is 0.42% ionized in 0.80 M solution. The Ka for this acid is ( )
A. 1.42 ´ 10-5
B. 1.42 ´ 10-7
C. 1.77 ´ 10-5
D. 6.15 ´ 104
The following data are given at 1000 K: CO(g) + H2O(g) « CO2(g) + H2(g), DHo = -42 kJ, Kc = 0.66. After an initial equilibrium is established in a 1.00 L container, the equilibrium amount of H2 can be increased by ( )
A. adding a catalyst
B. increasing the temperature
C. transferring the mixture to a 10.0 L container
D. in some way other than (a), (b), or (c).
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