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Please provide explanation 1. A hydrocarbon undergoes complete combustion with excess air. If the percent excess...

Please provide explanation

1. A hydrocarbon undergoes complete combustion with excess air. If the percent excess air is increased by 10%, the molar air-to-fuel ratio for the combustion will

a. decrease by more than 10%

b. decrease by 10%

c. not change

d. increase by 10%

e. increase by more than 10%

2. A hydrocarbon undergoes complete combustion in a well-insulated combustion chamber with excess air. If the percent excess air is increased, the adiabatic flame temperature of the productions will

a. increase

b. not change

c. decrease

d. need more information

3. How many kg of dry air is required to completely combust 1 kg of pure carbon?

4. Whenever gasoline (estimated as octane: C8H18) is mixed with air the mixture will undergo combustion.

a. true

b. false

5. Combustion of octane, C8H18, with air is

a. exothermic

b. adiabatic

c. autocatalytic

d. endothermic

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