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Calculate heat relesed (in Kj) when 2 mo...

Calculate heat relesed (in Kj) when 2 moles of gaseous methane undergoes combustion in a rigid vessel of volume 50 liters causing a change in pressure from 10 bar to 2 bar at 300K.
[Useful data : `DeltaH_(f)H_(2)O` =-280kJ/mole,
`DeltaH_(f)CO_(2)`=-390kJ/mole,
`DeltaH_(f)CH_(4)`=-390kJ/mole,=-70kJ/mole],

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