State where each gas used in the Haber process mainly comes from. nitrogen ................. hydrogen .................
State what the symbol $\Delta H$ means.
State why this value indicates that the forward reaction is exothermic.
State the usual conditions and name the catalyst used in the Haber process. temperature ................. ^{\circ}C pressure ................. kPa catalyst .................
Complete Table 3.1 to show the effect, if any, when the normal conditions in the Haber process are altered. Use only the words increases, decreases or no change.
Explain in terms of collision theory why increasing the temperature increases the rate of the reaction.
State the formula of the acid used.
State one use of ammonium sulfate.
Calculate the percentage by mass of nitrogen in $(\text{NH}_4)_2\text{SO}_4$. percentage of nitrogen = ................. %