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Given that standard heat enthalpy of CH(...

Given that standard heat enthalpy of `CH_(4), C_(2)H_(4)` and `C_(3)H_(8)` are -17.9, 12.5, -24.8 Kcal/mol. The `Delta H` for `CH_(4)+C_(2)Hrarr C_(3)H_(8)` is :

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Given that standard heat enthalpy of CH_4, C_2 H_4 and C_3H_8 are -17.9, 12.5, -24.8 kcal/mol. The triangleH for CH_4+C_2H_4rarrC_3H_8 is:

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