Consider the reaction, C2H4 (g) + H2 (g)- C2H6 (g) where -137kJ of heat is released.

How many kilojoules are released when 55.3g of C2H4 reacts?

How many kilojoules are released when 55.3g of C2H4 reacts?

2 Answers

137 kJ heat released for 28 g C2H4. You have 55.3g; therefore, heat released will be 137 kJ x (55.3/28) = ??

Another way to look at it.

This is 137 kJ heat released per mol C2H4.How many moles do you have?

That is 55.3/28 = 1.975 moles

Then 1.37 kJ/mol x 1.975 mol = ??

Another way to look at it.

This is 137 kJ heat released per mol C2H4.How many moles do you have?

That is 55.3/28 = 1.975 moles

Then 1.37 kJ/mol x 1.975 mol = ??

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