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Given: C_(("Graphite"))+O_(2(g))toCO_(2(g)), Delta_rH^@=-393.5 kJ mol^-1 H_(2(g))+1/2 O_(2(g)) to H_2O_((l)), Delta_rH^@=-285.8 kJ mol^-1 CO_(2(g))+2H_2O_((l)) to CH_(4(g))+2O_(2(g)), Delta_r H^@=+890.3 kJ mol^-1 Based on the above thermochemical equations, the value of Delta_r H^@ at 298 K for the reaction C_(("graphite")) + 2H_(2(g)) to CH_(4(g)) will be _________ . |
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Answer» `+74.8 KJ mol^-1` |
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