CO(g) + H2O(g) → CO2(g) + H2(g). Calculate the standard heat change if the standard enthalpies of formation of CO2g, H2O(g) and CO(g) in KJ mol-1 are −394, −242 and −110 kJ mol−1 respectively.
+262 KJ mol−1
−262 KJ mol−1
+42 KJ mol−1
−42 KJ mol−1
An increase in entropy can best be illustrated by
mixing of gases
freezing of water
condensation of vapour
solidifying candle wax
The highest rate of production of carbon(IV) oxide can be achieved using
0.05 mol−3 HCl and 5g powdered CaCO3
0.05 mol−3 HCl and 5g lump CaCO3
0.10 mol−3 HCl and 5g powdered CaCO3
0.025 mol−3 HCl and 5g powdered CaCO3
2HCl(aq) + CaCO3(s) → CaCl2(s) + CO2(g) + H2O(l). From the curves L, M, N, P, which represents the production of CO2 gas as dilute HCl is added?
L
M
N
P
2CO(g) + O2(g) ⇌ 2CO2(g). High pressure will favour the forward reaction because the process
high pressure favours gas formation
the reaction is in dynamic equilibrium
the reaction is exothermic
the process occurs with a decrease in volume
