The Effect Of Temperature Changes On Equilibrium (ht Only) (GCSE Chemistry)

A reaction profile shows products at higher energy than reactants. If the system is at equilibrium and temperature is increased, Le Chatelier’s principle predicts:

At constant temperature, adding a catalyst to an equilibrium system will:

A system at equilibrium is exothermic forward. Which of these will increase the product yield most dramatically?

For the equilibrium A ? B, a decrease in temperature causes the position to move to the left. The forward reaction is therefore:

If the forward reaction is endothermic, which of these is true about operating industrially to maximise product yield?

A student measures equilibrium concentrations at two temperatures and finds K1 > K2 where K1 is at lower temperature. The forward reaction must be:

Which of the following statements about the effect of temperature on an equilibrium constant K is correct?

Which graph best shows the effect of a catalyst on a reaction energy profile (activation energy Ea and overall ?H unchanged)?

When a reaction is exothermic in the forward direction, which of these changes will increase K (equilibrium constant) for the forward reaction?

An endothermic forward reaction has activation energy Ea,f and reverse Ea,r. Adding heat (raising temperature) generally:

At constant temperature, for the reaction P ? Q, the measured K decreases when a small amount of Q is removed and the new equilibrium is established. This implies: