InterviewSolution
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InterviewSolution
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The standard free energy of formation of MgO AND CO at temperature `1000^(@)C and 2000^(@)C` are given below (they refer to the reaction involving one mole of oxygen at one atomsphere pressure) The free energy change to the reaction. `2Mg+O_(2) to 2MgO " " DeltaG_(1000^(@)C)=-941kJ//mol` `" "DeltaG_(2000^(@)C)=-341kJ//mol` `2C+O_(2) to 2CO " " DeltaG_(1000^(@)C)=-439kJ//mol` `" "DeltaG_(2000^(@)C)=-628kJ//mol`A. At `1000^(@)C` temperatureB. At `2000^(@)C` temperatureC. Both a and bD. None of these |
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Answer» Correct Answer - B `2MgO+2C to 2Mg+CO` `" " DeltaG_("Reaction")=DeltaG_(CO)-DeltaG_(MgO)` `At 1000^(@)C,DeltaG=-439+941 gt 0("Non-spontaneous")` `At 2000^(@)C,DeltaG=-439+941 gt 0("spontaneous")` |
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