For the dissociation reaction 2 H2S(g) « 2 H2(g) + S2(g), Kp = 1.2 ´ 10-2 at 1065 oC. For this same reaction at 1000 K ( )
A. Kc is less than Kp
B. Kc is greater than Kp
C. Kc= Kp
D. whether Kc is less than, equal to, or greater than Kp depends on the total gas pressure.
查看答案
The volume of the reaction vessel containing an equilibrium mixture in the reaction SO2Cl2(g) « SO2(g) + Cl2(g) is increased. When equilibrium is re-established, ( )
A. the amount of Cl2 will have increased
B. the amount of SO2 will have decreased
C. the amounts of SO2 and Cl2 will have remained the same
D. the amount of SO2Cl2will have increased
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)
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
微信支付 
支付宝支付