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
Hydrogen peroxide decomposes according to the following thermochemical reaction:
  • a) -2.89 kJ
  • b) -2.80 kJ
  • c) -2.00 kJ
  • d) -2.85 kJ
Q.3
Calculate ΔH if a piece of metal with a specific heat of 0.kJ-kg-1-K-1 and a mass of 2kg is heated from 22°C to 28°C.
  • a) 11.66 kg
  • b) 11.56 kg
  • c) 11.76 kg
  • d) 11.26 kg
Q.4
If a calorimeter’s ΔH is +Joules, how much heat did the substance inside the cup lose?
  • 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
Calculate ΔH if a piece of aluminum with a specific heat of 0.9 kJ-kg-1-K-1 and a mass of 1.6 kg is heated from 286°K to 299°K.
  • a) 16.52 kJ
  • b) 17.72 kJ
  • c) 18.72 kJ
  • d) 15.52 kJ
Q.7
Calculate the ΔH value of the reaction:
  • a) 141.8
  • b) 121.8
  • c) 131.8
  • d) 151.8
Q.8
Calculate ΔH for the reaction:
  • a) 867
  • b) 895
  • c) 847
  • d) 875
Q.9
Consider the reaction:
  • a) 96.80 kJ
  • b) 95.30 kJ
  • c) 96.50 kJ
  • d) 95.50 kJ
Q.10
Refer to Q9 and answer what is the enthalpy change for the reaction of 100.0 g of nitrogen with excess oxygen?
  • a) 1164 kJ
  • b) 1190 kJ
  • c) 1194 kJ
  • d) 1160 kJ
Q.11
2SO2(g) + O2(g) → 2 SO3(g)
  • 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
0 h : 0 m : 1 s