O 5/3/2017 11:55 PM A 7.8/10 O 5/2/2017 05:10 PM Gradebook Print m Calculator Pe
ID: 524491 • Letter: O
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O 5/3/2017 11:55 PM A 7.8/10 O 5/2/2017 05:10 PM Gradebook Print m Calculator Periodic Table Question 9 of 9 Map University Science Books General Chemistry 4th Edition McQuarrie Rock Gallogly presented by Sapling Use the data given here to calculate the values of AG at 25 °C Compound AG (kJ/mol) rXn for the reaction described by the equation +387.7 +507.2 A B C +402.0 Number AG 492.9 kJ mol If AHrxn and ASrxn are both negative values, what drives the spontaneous reaction and in what direction at standard conditions? The spontaneous reaction is O entropy-driven to the right O enthalpy-driven to the left. O enthalpy-driven to the right O entropy-driven to the left A Previous Check Answer Next Exit HintExplanation / Answer
deltaG= dleta G of products- deltaG of reactants = 1*deltaG of C - 1*deltaG of A - 1*deltaG of B
1,1 and 1 are coefficients of C, B and A respectively.
= 402-507.2-387.7= -492.9 Kj/mole
if Gibbs free energy change is -ve, the reactionis spontaneous. at standard conditions, since deltaG is -ve, delta S is +ve. then the reaction is spontaneous. hence entropy driven to the left becomes spontaneous.
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