UNIPORT Chemistry 2009/2010 Past Questions

Practice each question, then open it to see the full details.

A certain volume of mass at 295k is heated such that its volume and pressure are now four times the original values. What is the new temperature?

A.18.6K
B.100K
C.298.0K
D.1192.0k
E.4720K

2CO_(g) + O_2(g) → 2CO_2(g). given that ΔH[CO] is -110.4kj/ol and ΔH[CO₂] is -393 kj/mol. The energy change of the reaction above is?

A.-503.7kj
B.-282.6kj
C.+282.6kj
D.+503.7kj
E. 48.35g

How many moles of lime stone will be required to produce 5.6g of CaO?

A.0.20mol
B.0.10mol
C.1.12mol
D.0.56mol

One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at S.T.P?[G.M.V = 22.4dm³]

A.112.0dm³
B.67.2dm³
C.56.0dm³
D.44.8dm³