Stoichiometry Involving Combustion of Fuels (VCE SSCE Chemistry): Quizzes

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Stoichiometry Involving Combustion of Fuels
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What does stoichiometry study in chemical reactions?

Mole ratios of substances

What is the molar volume at SLC (25°C, 100 kPa)?

24.8 L mol1^{-1}

In CH4+2O2CO2+2H2O\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}, what is the O2\text{O}_2:CH4\text{CH}_4 mole ratio?

2:1

What are the products of complete combustion of a hydrocarbon fuel?

CO2\text{CO}_2 and H2O\text{H}_2\text{O}

For gases at constant T and P, how do mole ratios relate to volume ratios?

They are equal

Which formula converts mass to moles?

n=mMn = \frac{m}{M}

Which gases are greenhouse gases produced from fuel combustion?

CO2\text{CO}_2 and H2O\text{H}_2\text{O}

Why does bioethanol reduce net greenhouse emissions compared to petrol?

Crops absorb CO2\text{CO}_2 during growth

What indicates incomplete combustion has occurred?

Limited oxygen supply

What does a negative ΔH\Delta H value in a thermochemical equation indicate?

Energy is released (exothermic)

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