Is deltaG standard for things like Cl 2 and O 2 always zero?? 1. Assuming standa

Question

Is deltaG standard for things like Cl2 and O2 always zero??

1. Assuming standard conditions, can the following reaction take place at room temperature? 3 C12 (g)-2 CH4 (g) CH,CI (g) + CH2Cl2(g) + 3 HCl (g) AG (CH.)--50.72 kJ/mol AG (CH,CI)-57.37 kJ/mol AG (CH2Cl2) - -68.85 kJ/mol AG (HCI) 95.30 kJ/mol (a)Yes, the reaction will be spontaneous at room temperature (b) No, the reaction will not be spontaneous at room temperature (c) No, the reaction will be at equilibrium at room temperature Yes, the reaction will be at equilibrium at room temperature Not enough information to solve the problem (e)

Explanation / Answer

yes delta G for CL2 and O2 always 0 because they are present in the elemental state.

for spontaneous reaction delta G should be negative

delta G (product) - delta G (reactant)

(CH3Cl + CH2Cl2 + HCL ) -(CH4)

[ (-57.37 )+(-68.85) + ( -95.30) ] - [-50.72]

= -170.8 Kj/mole

yes the reaction will be spontaneous at room temperature

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