Quiz:
Answer:
Heat of combustion (calculation)
An experiment was carried out to determine the heat of combustion of ethanol.
The table below shows the experimental results
| Volume of water in copper tin (cm3) |
200
|
Mass of spirit lamp before heating (g)
|
189.55
|
Mass of spirit lamp after heating (g)
|
188.80
|
Initial temperature of water (C)
|
28.5
|
Maximum temperature of water (C)
|
53.5
|
a) Calculate the number of mole of ethanol used.
b) Calculate the heat absorbed by the water.
c) Calculate the heat of combustion of ethanol.
[Specific heat capacity of solution : 4.2 J g-1 0C-1 . Density of solution : 1 g cm-3 ]
Relative atomic mass: H = 1; C = 12; O = 16]
Answer: a) 0.0163 mol b) 21 kJ c) – 1288.34 kJ mol-1
Subscribe to:
Posts (Atom)