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This quiz contains 6 questions from a mix of 1 subtopics.
A beaker with 50 g of water was initially at a temperature of 25°C.
A student uses a spirit burner to heat the water and records the highest temperature of 48°C.
The specific heat capacity of water is 4.2 J/g°C
How much heat energy is required?
J
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A beaker with 75 g of water was initially at a temperature of 23.2°C.
A student uses a spirit burner to heat the water. The burner transfers 6,458 J.
The specific heat capacity of water is 4.2 J/g°C
Calculate the final temperature of the water.
°C
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A student is completing a calorimetry experiment with a spirit burner containing ethanol.
During the combustion reaction 0.78 g of ethanol was used.
The reaction released 12,540 J of heat energy.
The Mr of ethanol = 46
Calculate the molar enthalpy ΔH of ethanol. Give your answer in kJ/mol to the nearest whole number.
kJ/mol
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Which of the following is the equation to show the heat energy released by a chemical reaction?
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A copper can containing 75 g of water is heated from 23°C to 75°C.
The specific heat capacity of water is 4.2 J/g°C
Calculate the energy transferred to the water.
7,245 J
543,375 J
16,380 J
23,625 J
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A combustion reaction released 15.3 kJ of heat energy.
The mass of fuel used was 1.25 g and the molar mass of the fuel is 46.
Calculate the molar enthalpy ΔH of the fuel.
880 kJ/mol
0.266 kJ/mol
563 kJ/mol
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