For the following reaction, calculate an approximate value for the change in free energy, and determine whether or not the reaction is spontaneous under standard conditions.
 | -230 kJ/mol, yes |
 | +2300 kJ/mol, yes |
 | -1171 kJ/mol, yes |
 | +230 kJ/mol, no |
 | +2300 kJ/mol, no
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