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Standard IX
Physics
Conventional Sources of Energy
enthalpy of c...
Question
enthalpy of combusstion of propane, bu†an e, and pen†an e are -2220, -2878, -3537 kj/mole respectively . order of calorific value (per gram ) of fuel will b
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Q.
Heat of combustion of CH4, C2H4, C2H6 are -890, -1411, -1560 kJ/mol respectively. Which calorific fuel value in kJ/g?
Q.
In order to get maximum calorific output, a burner should have an optimum fuel to oxygen ratio which corresponds to 3 times as much oxygen as is required theoretically for complete combustion of fuel. A burner which has been adjusted for methane as fuel (with
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and
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Assume that losses due to incomplete combustion, etc. are the same for both fuels and that gases behave ideally. Heat of combustion for
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1
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In order to get same calorific output, the rate of supply of oxygen would be:
Q.
The enthalpy change for the reaction
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at
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(
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o
l
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Q.
Heat of combustion of a fuel mol. wt 86 is 688 kJ/mol. The calorific value of fuel is
Q.
A cylinder of gas is assumed to contains 14 kg of butane. If a normal family needs 20,000 kJ of energy per day for cooking, The cylinder will last:
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