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A cylinder of gas supplied by Bharat Pet...

A cylinder of gas supplied by Bharat Petroleum is assumed to contain `14 kg` of butance. If a normal family requires 20,000 kJ of energy per day for cooking, butane gas in the cylinder lasts
`(Delta_(C ) H^(@)` of `C_(4) H_(10) = - 2658 kJ mol^(-1))`

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