What is the heat of combustion of ethane, C2H6, in kilojoules per mole of ethane? I…
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Question “What is the heat of combustion of ethane, C2H6, in kilojoules per mole of ethane? I…”
What is the heat of combustion of
ethane, C2H6, in kilojoules per mole of ethane?
I know the answer is -1560. I
need to know WHY and HOW to get to this answer.
Answer
For the combustion of ethane, write the balanced equation.
Use the standard values for enthalpies that form reactants and products to calculate the heat of combustion.
A balanced equation is one that contains all reactants and products in a fixed proportion. These are the characteristics of a balanced equation:
1. It should be consistent with the law of conservation mass.
2. The product side should have the same number of elements as the reactant side.
3. To balance a reaction, the Stoichiometric coefficients of the reactant or product molecules are placed in front. You can use fractional or whole numbers of the coefficients.
Combustion refers to a chemical reaction in which a substance is burned with oxygen. These products are known as combustion products.
Heat of combustion is the amount of heat that is released upon combustion. It is indicated by
is the unit of heat of combustion.
This is the combustion reaction of ethane:
To get the balance equation, add a coefficient (7/2) to
, a coefficient (2 for #media_tag_4$) and a coefficient (3 for $5$).
Here is the balanced response: