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Answered 2014-06-25 17:21:11

An endothermic reaction takes in heat from its surroundings. One example of a spontaneous endothermic reaction is an ice pack that doesn't have to be kept in the freezer. When the ice pack is struck with your palm the membrane is broken and the salt is dissolved in the water. The equation would be NH4NO3 plus H2O is equal to NH4 plus NH3.

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Is an endothermic reaction spontaneous?

Sometimes yes, sometimes no.

What are a set of conditions would result in a reaction that is unambiguously non-spontaneous?

endothermic, increasing entropy

Is neutralization an endothermic or exothermic process?

Generally exothermic as neutralization is a spontaneous reaction.

What is a non-spontaneous reaction that absorbs free energy from its surroundings?


Is spontaneous reaction exo or endo?

Reactions are described by this equation: GD = HD - TDS where D = delta for change in values. GD < 0 spontaneous HD < 0 exothermic ; HD > 0 endothermic The first equation is Gibbs free energy. When G is negative, the reaction is spontaneous. In contrast, a positive number G is non spontaneous. The interesting thing is that spontaneous reactions can be EITHER exothermic and endothermic. Lets look at this: lets assume HD has a value of 100. This means TDS would have to be bigger than 100 in order to make GD a negative number. An endothermic reaction which has a positive H can still be exothermic. Here's another way to pose your question: Is an exothermic reaction spontaneous? Always. Is an endothermic reaction spontaneous? This can be either.

What can be said about an endothermic reaction with a negative entropy change?

spontaneous in the reverse direction at all temperatures.

The synthesis of carbon disulfide is spontaneous and exothermic at room temperature what must be true regarding this reaction?

The reverse reaction is endothermic and nonspontaneous.

The synthesis of decomposition of nitrogen dioxide is endothermic and nonspontaneous at room temperature what must be true regarding this reaction?

The reverse reaction is exothermic and spontaneous.

Under what conditions is an endothermic chemical reaction in which the entropy of the system increases likely to be spontaneous?

PLEASE don't ask these questions

Are endothermic reactions always nonspontaneous?

All reactions need some activation energy. With a endothermic reaction it is absorbing energy from its surroundings. So endothermic reactions can be spontaneous if there is sufficient energy in its surrounding but if there is not then it will never happen. To answer your question endothermic reactions are always nospontanius.

The precipitation of potassium chloride is nonspontaneous and exothermic at room temperature what must be true regarding this process?

The reverse reaction is endothermic and spontaneous.

Chemical reaction that absorbs energy?

Endothermic reaction

Why is photosynthesis considered as endothermic reaction?

It is a exothermic reaction. It is not a endothermic reaction.

Is photosynthesis an endothermic reaction or an exothermic reaction?


What can be done to make a non-spontaneous reaction become spontaneous?

For some non-spontaneous reactions, you can change the temperature. For other non-spontaneous reactions, there is nothing you can do to make it spontaneous. Nature favors reactions that increase a system's entropy (disorder) and nature favors reactions that are exothermic (they release enthalpy). Any reaction that does both of these things is spontaneous at all temperatures. Any reaction that does neither of these things is never spontaneous. As far as this question is concerned, the interesting reactions are endothermic reactions that increase entropy and exothermic reactions that decrease entropy. Whether these reactions are spontaneous depends on the temperature. The first variety (endothermic, increase entropy) will be spontaneous at high temperatures; the second (exothermic, decrease entropy) will be spontaneous at low temperatures. To find the temperature at which a reaction becomes spontaneous, one may apply the Gibbs equation: DG = DH - TDS where capital Ds stand for the Greek capital delta.

Is breaking an ice pack an endothermic reaction or exothermic reaction?

endothermic reaction

Is water electrolysis an endothermic reaction or an exothermic reaction?

Endothermic :)

Is water gas reaction endothermic?

yes it is a endothermic reaction

Is caramelizing sugar a endothermic or exothermic reaction?

This is an endothermic reaction.

What is the proper name for a chemical reaction that takes in heat?

endothermic reaction

What does an endothermic reaction do?

There are two types of reactions, thermally. Endothermic and exothermic. An endothermic reaction absorbs heat and an exothermic reaction releases it.

Is photosynthesis an exothermic or endothermic reaction?

Photosynthesis is considered an endothermic reaction and is not an exothermic reaction. This is one of the most important endothermic reactions.

Is hydrolysis an endothermic reaction?


What happened in an endothermic reaction?

An endothermic reaction need heat to occur.

What Defines an Endothermic Reaction?

An endothermic reaction need heat to begin.

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