How do the following changes affect the value of the equilibrium constant for a gas-phase exothermic reaction:
1. removal of a reactant
A. increase equilibrium constant
B. decrease equilibrium constant
C. no effect
2. removal of a product
A. increase equilibrium constant
B. decrease equilibrium constant
C. no effect
3. decrease in the volume
A. increase equilibrium constant
B. decrease equilibrium constant
C. no effect
4. decrease in the temperature
A. increase equilibrium constant
B. decrease equilibrium constant
C. no effect
5. addition of catalyst
A. increase equilibrium constant
B. decrease equilibrium constant
C. no effect