Q.1
##### At what standard conditions does the heat of combustion calculated?
• a) 26°C, 1 atm
• b) 25°C, 0.5 atm
• c) 25°C, 1 atm
• d) 26°C, 0.5 atm
Q.2
• a) -2.89 kJ
• b) -2.80 kJ
• c) -2.00 kJ
• d) -2.85 kJ
Q.3
• a) 11.66 kg
• b) 11.56 kg
• c) 11.76 kg
• d) 11.26 kg
Q.4
• a) +2000 J
• b) – 2001 J
• c) – 2000J
• d) + 2001 J
Q.5
##### Calculate the ΔH of the following reaction: CO2(g) + H2(g)O -> H2CO3(g) if the standard values of ΔHf are as follows: CO2(g) : -393.KJ/mol, H2O(g): – 241.KJ/mol, and H2CO3(g) : – 275.2 KJ/mol.
• a) +360.139 KJ
• b) +350.129 KJ
• c) – 360.139 KJ
• d) -350.129 KJ
Q.6
• a) 16.52 kJ
• b) 17.72 kJ
• c) 18.72 kJ
• d) 15.52 kJ
Q.7
• a) 141.8
• b) 121.8
• c) 131.8
• d) 151.8
Q.8
• a) 867
• b) 895
• c) 847
• d) 875
Q.9
• a) 96.80 kJ
• b) 95.30 kJ
• c) 96.50 kJ
• d) 95.50 kJ
Q.10
• a) 1164 kJ
• b) 1190 kJ
• c) 1194 kJ
• d) 1160 kJ
Q.11
• a) 1435 kJ
• b) 1343 kJ
• c) 1345 kJ
• d) 1433 kJ
Q.12
##### Calculate the work done in the following reaction when 2 mol of NH4NO3 decomposes at constant pressure at°C. State whether work is on the system or by the system.
• a) – 18.61 kJ
• b) – 18.86 kJ
• c) – 18.65 kJ
• d) – 18.85 kJ