In a combustion reaction, one of the reactants is _____.
2 answers:
Answer: oxygen
Explanation:
Combustion is a type of chemical reaction in which fuel is reacted with oxygen to form carbon dioxide and water.
Example:
Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. Reactants are written on left side of the arrow.
Thus glucose and oxygen are reactants of combustion reaction.
Products are defined as the substance which are formed at the end of the chemical reaction.Products are written on the right side of the arrow.
Thus carbon dioxide and water are products of combustion reaction.
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<u>Answer:</u>
<u>For a:</u> The amount of heat transferred for the given amount of methanol is 94.6736 kJ.
<u>For b:</u> The mass of methane gas produced will be 10.384 g.
<u>Explanation:</u>
For the given chemical reaction:
- <u>For a:</u>
To calculate the number of moles, we use the equation:
......(1)
Given mass of methanol = 24.0 g
Molar mass of methanol = 32.04 g/mol
Putting values in above equation, we get:
By Stoichiometry of the reaction:
For every 2 moles of methanol, the amount of heat transferred is +252.8 kJ.
So, for every 0.749 moles of methanol, the amount of heat transferred will be =
Hence, the amount of heat transferred for the given amount of methanol is 94.6736 kJ.
- <u>For b:</u>
By Stoichiometry of the reaction:
252.8 kJ of energy is absorbed when 2 moles of methane gas is produced.
So, 82.1 kJ of energy will be absorbed when = of methane gas is produced.
Now, calculating the mass of methane gas from equation 1, we get:
Molar mass of methane gas = 16 g/mol
Moles of methane gas = 0.649 moles
Putting values in equation 1, we get:
Hence, the mass of methane gas produced will be 10.384 g.