SPM Chemistry 2019 Q41

Question

Diagram 15 shows the apparatus set-up to determine the heat of combustion of propanol.
Rajah 15 menunjukkan susunan radas untuk menentukan haba pembakaran bagi propanol.

When 2.4g of propanol is used to heat up X cm3 of water, the temperature rises from 25 C to 40 C. What is the value of X?
[Molar mass of propanol = 60gmol-1, specific heat capacity of water = 4.2Jg-1C-1, H of propanol = -315 kJmol-1, density of water = 1gcm-3]
Apabila 2.4g propanol digunakan untuk memanaskan Xcm3 air, suhu meningkat daripada 25C kepada 40C.
Apakah nilai X?
[Jisim molar propanol = 60gmol-1, muatan haba tentu air = 4.2Jg-1C-1, H bagi propanol =  -315 kJmol-1, ketumpatan air = 1gcm-3]

 

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    2020-12-28T12:29:12+08:00

    Answer is D. Solution is attached.

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