Question

Under which conditions is a reaction spontaneous?

When the temperature is zero and the enthalpy is positive and high and the entropy of the change is negative and high.

When the temperature and entropy of a change are high and positive and the enthalpy is low and negative.

When the enthalpy of the change is small and negative and the product of temperature and entropy is large and negative.

When the temperature and the enthalpy are positive and high and the entropy of the change is negative and high.
Done

Answer 1

if your a plato user the second option is correct....

Answer 2

Answer:

When the temperature and entropy of a change are high and positive and the enthalpy is low and negative.

Explanation:

A reaction is spontaneous if the free energy change of the reaction is negative.

The relation between free energy change, entropy and enthalpy is:

ΔG = ΔH-TΔS

Where

ΔG = free energy change

ΔH= enthalpy change

ΔS= entropy change

T= temperature

Now for a reaction with negative enthalpy and positive entropy will always be spontaneous.

If product of entropy and temperature is negative and enthalpy if negative and low then ΔG will be positive.