How much heat is released when 75 g of octane is burned completely if the enthalpy of combustion is -5,500 kj/mol c8h18

Answer : The heat released during the reaction is

Explanation :

First we have to calculate the number of moles of octane .

Molar mass of = 114 g/mole

Now we have to calculate the heat released during the reaction.

or,

where,

= enthalpy change = -5500 kJ/mol

q = heat released = ?

n = number of moles of = 0.658 mol

Now put all the given values in the above formula, we get:

Therefore, the heat released during the reaction is

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