I have a few questions that I am stuck on and would really appreciate any help :)
1) Kp = 85 at 460°C and Kp = 21 at 800°C for the following reaction:
NO2(g) + SO2(g) <----> NO(g) + SO3(g)
Which one of the following statements is true?
a) △rH° > 0 and Kc < Kp
b) △rH° < 0 and Kc > Kp
c) △rH° = 0 and Kc = Kp
d) △rH° < 0 and Kc = Kp
e) △rH° > 0 and Kc = Kp
The answer says D but I can't figure out why.
2) Given the following thermochemical data, what is the enthalpy of formation △fH°298 for C6H6 (l) at 298K and 100kPa?
C6H6 (l) + 3H2(g) --> C6H12 (l) △H° = -206 kJ mol-1
6H2 (g) + 6C (s) --> C6H12 (l) △H° = -123 kJ mol-1
3) Samples of A (2.0 mol) and B (3.0 mol) are placed in a 10.0 L container and the following reaction takes place:
2A(g) <-----> 3B(g)
At equilibrium, the concentration of A is 0.14 M. What is the value of Kc?