calculate the amount of heat produced by burning 5 litre of diesel
Answers
Answer:
Gasoline is composed of hydrocarbons, which are hydrogen
(H) and carbon (C) atoms that are bonded to form
hydrocarbon molecules (CX
HY
). Air is primarily composed of
nitrogen (N) and oxygen (O2
).
A simplified equation for the combustion of a hydrocarbon
fuel may be expressed as follows:
Fuel (CX
HY
) + oxygen (O2
) + spark g water (H2
O) +
carbon dioxide (CO2
) + heat
In this combustion reaction, we see that the hydrogen from
the gasoline combines with oxygen from the air to produce
water (H2
O). Similarly, the carbon from the fuel combines
with the oxygen from the air to produce carbon dioxide
(CO2
). The combustion process also produces heat that is
converted into the mechanical energy that propels the
vehicle.
So it’s the oxygen from the air that makes the exhaust
products heavier.
Now let’s look specifically at the CO2
reaction. This reaction
may be expressed as follows:
C + O2 g CO2
Carbon has an atomic weight of 12, oxygen has an atomic
weight of 16 and CO2
has a molecular weight of 44
(1 carbon atom [12] + 2 oxygen atoms [2 x 16 = 32]).
Therefore CO2
is 3.67 times heavier than carbon
(44 ÷ 12 = 3.67).
This is how 1 L of gasoline, which contains about 0.63 kg of
carbon, can produce about 2.3 kg of CO2
(3.67 × 0.63 kg = 2.3 kg).
Explanation: