Equilibrium (GCSE Chemistry)

For the equilibrium 2 NO2(g) ? N2O4(g), which change would make the mixture turn a paler (less brown) colour?

When ammonium nitrate dissolves in water the temperature of the solution falls. Which statement best describes this process?

When the temperature is increased for the equilibrium 2HI ? H2 + I2, the equilibrium shifts to the right. What does this tell you about the forward reaction?

In the industrial formation of SO3 from SO2 + 1/2 O2 ? SO3, why is a compromise temperature (not extremely low) chosen?

Which experimental change increases the rate of reaction by increasing the frequency of successful collisions?

A reversible reaction releases 120 kJ when 2 moles of product form. If 1 mole reacts in the reverse direction, how much energy change occurs?

Which change would NOT affect the position of a chemical equilibrium for gases?

Which of the following best defines a catalyst?

Which experimental change will increase the rate but NOT change the position of equilibrium for a reversible reaction?

In a rate experiment, a student measures how long it takes to collect a fixed volume of gas. If the time measured increases, what does this indicate about the rate?

Which of the following is the best practical test to show hydrogen gas is being produced in a reaction?