(b) The student repeats the experiment three times. The table shows her results. Volume of gas burned in cm Temperature rise of water in °C Experiment 1 1450 34.8 1875 41.2 3 1620 37.7 (i) Calculate the amount, in moles, at room temperature and pressure, of methane burned in experiment 1. Assume that natural gas contains only methane. (The volume of 1 mol of a gas at room temperature and pressure is 24 000 cm)

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(b) The student repeats the experiment three times.
The table shows her results.
Volume of gas burned
in cm
Temperature rise
of water in °C
Experiment
1
1450
34.8
2
1875
41.2
3
1620
37.7
(i) Calculate the amount, in moles, at room temperature and pressure, of methane
burned in experiment 1.
Assume that natural gas contains only methane.
(The volume of 1 mol of a gas at room temperature and pressure is 24000 cm)
Transcribed Image Text:(b) The student repeats the experiment three times. The table shows her results. Volume of gas burned in cm Temperature rise of water in °C Experiment 1 1450 34.8 2 1875 41.2 3 1620 37.7 (i) Calculate the amount, in moles, at room temperature and pressure, of methane burned in experiment 1. Assume that natural gas contains only methane. (The volume of 1 mol of a gas at room temperature and pressure is 24000 cm)
i) The quantity of heat energy released in experiment 1 is 29 200 J.
Calculate the molar enthalpy change, in kJ/mol, for the combustion of methane.
(ii) The temperature rise in experiment 2 is 41.2 °C.
Calculate the heat energy change in experiment 2 using the expression
heat energy change = volume of water x 4.2 x temperature change
(i °C)
(in J)
(in cm)
Transcribed Image Text:i) The quantity of heat energy released in experiment 1 is 29 200 J. Calculate the molar enthalpy change, in kJ/mol, for the combustion of methane. (ii) The temperature rise in experiment 2 is 41.2 °C. Calculate the heat energy change in experiment 2 using the expression heat energy change = volume of water x 4.2 x temperature change (i °C) (in J) (in cm)
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