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How much heat is produced when 4.50g met...

How much heat is produced when `4.50g` methane gas is burnt in a constant pressure system ?
Given `:CH_(4)+2O_(2)rarr CO_(2)+2H_(2)O,DeltaH=-8.2kJ`

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Verified by Experts

`:' 16g CH_(4)` on burning produces heat `=-802kJ`
`:. 4.5g CH_(4)` on burning produces heat
`=(-802xx4.5)/(16)=-225kJ`
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