Does anyone have solutions for last years vcaa exam
If not would you be able to have a look at my responses for the following questions:
Q2a)
Increasing the temperature increases the rate of production of O2. This is because the increase in temperature increases the average kinetic energy of all molecules, increasing the frequency (no. of collisions per second) and energy of collisions between H2O2 molecules. Increasing temperature increases the proportion of successful collisions as more particles have energy greater than the activation energy, hence increasing ROR
7a)
The reaction mixture is expected to become browner. When the sealed test tube is placed in hot water this increases the temperature of the system. According to LCP, the system will partially oppose the change by decreasing the temperature and favour a net reverse reaction because this is endothermic and absorbs the energy. Thus, the position of equilibrium shifts to the left, increasing the concentration of NO2 and hence the system becomes browner.
b)K=0.060M-1
c) [NO2] will double then decrease by 2 parts, [N2O4] doubles then increases by 1 part