Font size
WorksheetsThermochemistry kuiz 2
Total questions: 10
Worksheet time: 5mins
Based on the following equation
(a) Mg(s) + H2SO4(aq) --------->.MgSO4(aq) + H2(g)
ΔH = - 467 kJ mol-1
the heat of reaction shows by symbol ΔH , sign negative shows....
Endothermic reaction
Exothermic reaction
Based on the following equation
(a) Mg(s) + H2SO4(aq) --------->.MgSO4(aq) + H2(g)
ΔH = - 467 kJ mol-1
the heat of reaction shows by symbol ΔH , sign negative
choose the Energy level diagram for this reaction.
based on the energy level diagram above choose the correct explanation.
Energy content of the reactants is higher than the products
Energy content of the products is higher than the reactants.
the reaction is endothermic
Diagram shows the energy level .
What is the value of heat of reaction , delta H?.
+100kJ
-100kJ
250kJ
-50kJ
50 cm3 of 1.0 mol dm-3 barium chloride solution reacts with 50 cm3 of 1.0 mol dm-3 sodium sulphate solution to form barium sulphate and sodium chloride. This experiment is carried out in a plastic container. The data for this experiment is as follows:
Initial thermometer reading
for barium chloride solution = 27 0C
Initial thermometer reading for
sodium sulphate solution = 28 0C
Maximum reading for mixture = 33.5 0C
Specific Heat Capacity for water = 4.2 J/g 0C
calculate the increase of temperature?
(a)
50 cm3 of 1.0 mol dm-3 barium chloride solution reacts with 50 cm3 of 1.0 mol dm-3 sodium sulphate solution to form barium sulphate and sodium chloride. This experiment is carried out in a plastic container. The data for this experiment is as follows:
Initial thermometer reading for barium chloride solution = 27 0C
Initial thermometer reading for
sodium sulphate solution = 28 0C
Maximum reading for mixture = 33.5 0C
Specific Heat Capacity for water = 4.2 J/g 0C
calculate the value heat change?
50400 J
2520kJ
50.4 kJ mol-1
2520 J
50 cm3 of 1.0 mol dm-3 barium chloride solution reacts with 50 cm3 of 1.0 mol dm-3 sodium sulphate solution to form barium sulphate and sodium chloride. This experiment is carried out in a plastic container. The data for this experiment is as follows:
Initial thermometer reading for barium chloride solution = 27 0C
Initial thermometer reading for
sodium sulphate solution = 28 0C
Maximum reading for mixture = 33.5 0C
Specific Heat Capacity for water = 4.2 J/g 0C
Calculate the Heat of precipitation?
2520J
+50.4 kJmol-1
50400J
-50.4 kJmol-1
What is the meaning of heat of displacement.
heat released when 1 mol of water is formed
The heat released when one mole of a metal is displaced from its salt solution by a more electropositive metal.
what is the formula to calculate heat change/heat released/or heat is absorbed?
heat change/ n.of mole
mass of solutionX changes in temp X heat capacity, C
heat change /n.of mole
50 cm3 sodium hydroxide solution 1.0 mol dm-3 reacts with 50 cm3 hydrochloric acid 1.0 mol dm-3 in a plastic container. The temperature changes from 28 0C to 34 0C. Calculate the heat of of neutralization in this reaction.
value heat capacity, C = 4.2 Jg-1 oC-1
50 400 J
-50.4kJmol-1
2520J
-2.5kJ mol-1
