What can be said about the spontaneity of reactions
when (1) `triangle H and triangle S` both positive (2) `triangle H and triangle S`are both
negative (3) `triangle H `is positive and `triangle S` (4) `triangle H` is negative
and `triangle S` is positive ?

Explanation

To determine the spontaneity of reactions based on the signs of enthalpy change (ΔH) and entropy change (ΔS), we can use the Gibbs free energy equation:

\[ \Delta G = \Delta H - T \Delta S \]

Where:
- ΔG = Gibbs free energy change
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