Achemical reaction has an increase in entropy and a decrease in enthalpy. what is known about the spontaneity of the reaction? spontaneous at high temperatures, nonspontaneous at low temperatures nonspontaneous at high and low temperatures spontaneous at low temperatures, nonspontaneous at high temperatures spontaneous at high and low temperatures

spontaneous at high and low temperatures

Explanation:

= Gibb's free energy change

= enthalpy change

T = temperature

= entropy change

A reaction is spontaneous when = Gibb's free energy change is negative.

Given = decrease in enthalpy = -ve

= increase in entropy = +ve

Thus

As   is always negative, it is spontaneous at all the temperatures.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.