After a while, the soda becomes room temperature; again, without any intervention on your part. From this, we can define a spontaneous reaction as a reaction that occurs in a given set of conditions without intervention. A spontaneous reaction proceeds to completion without any outside help.n a spontaneous reaction, just because the overall change in entropy is positive, does not mean that the entropy of the systems and surroundings should always both be positive.
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Full Definition of SPONTANEOUS. 1. : proceeding from natural feeling or native tendency without external constraint. 2. : arising from a momentary impulse.3. 4. : produced without being planted or without human labor: indigenous. 5. The comment was completely spontaneous. 2  He's a guy who's spontaneous and fun. 3  Shane has a lovely habit of paying us spontaneous visits: one time she brought over a jar of a pickle she'd recently put up; another time just a good story or two.
http://www.merriam-webster.com/dictionary/spontaneous
/spɑnˈteɪnijəs/. adjective. Learner's definition of SPONTANEOUS. 1. : done or said in a natural and often sudden way and without a lot of thought or planning. spontaneous laughter. a spontaneous kiss/decision. The comment was completely spontaneous.. [more spontaneous; most spontaneous] : doing things that have not been planned but that seem enjoyable and worth doing at a particular time. He's a guy who's spontaneous and fun. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. adverb.
http://www.learnersdictionary.com/definition/spontaneous
adj. 1. Happening or arising without apparent external cause; self-generated: a microorganism capable of spontaneous movement. 2. Arising from a natural inclination or impulse and not from forethought or prompting: spontaneous laughter; a spontaneous protest.3. Unconstrained and unstudied in manner or behavior: a spontaneous personality. 4. Growing without cultivation or human labor: spontaneous vegetation.rising from a natural inclination or impulse and not from forethought or prompting: spontaneous laughter; a spontaneous protest. 3. Unconstrained and unstudied in manner or behavior: a spontaneous personality. 4. Growing without cultivation or human labor: spontaneous vegetation.
http://www.thefreedictionary.com/spontaneous
Just because a reaction is spontaneous, it does not automatically imply that these reactions occur instantaneously. An example of this is when iron nails rust due to constant exposure to moisture -- this process does not occur overnight, but can take days or months.n a spontaneous reaction, just because the overall change in entropy is positive, does not mean that the entropy of the systems and surroundings should always both be positive.
http://study.com/academy/lesson/spontaneous-reaction-definition-examples-quiz.html
In a spontaneous reaction, just because the overall change in entropy is positive, does not mean that the entropy of the systems and surroundings should always both be positive.n a spontaneous reaction, just because the overall change in entropy is positive, does not mean that the entropy of the systems and surroundings should always both be positive.
http://study.com/academy/lesson/spontaneous-reaction-definition-examples-quiz.html
Spontaneous combustion or spontaneous ignition is a type of combustion which occurs by self heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, ignition.pontaneous combustion or spontaneous ignition is a type of combustion which occurs by self heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, ignition.
https://en.wikipedia.org/wiki/Spontaneous_combustion
Examples of SPONTANEOUS. 1  The comment was completely spontaneous. 2  He's a guy who's spontaneous and fun. 3  Shane has a lovely habit of paying us spontaneous visits: one time she brought over a jar of a pickle she'd recently put up; another time just a good story or two. The comment was completely spontaneous. 2  He's a guy who's spontaneous and fun. 3  Shane has a lovely habit of paying us spontaneous visits: one time she brought over a jar of a pickle she'd recently put up; another time just a good story or two.
http://www.merriam-webster.com/dictionary/spontaneous
2. [more spontaneous; most spontaneous] : doing things that have not been planned but that seem enjoyable and worth doing at a particular time. He's a guy who's spontaneous and fun.[+] more examples [-] hide examples [+] Example sentences [-] Hide examples.adverb.. [more spontaneous; most spontaneous] : doing things that have not been planned but that seem enjoyable and worth doing at a particular time. He's a guy who's spontaneous and fun. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. adverb.
http://www.learnersdictionary.com/definition/spontaneous
A reaction is said to be spontaneous if it occurs without being driven by some outside force. There are two driving forces for all chemical reactions. The first is enthalpy, and the second is entropy.Entropy (D S) is a measure of the disorder of a system, and systems tend to favor a more disordered system: nature tends toward chaos. Spontaneous reactions occur without outside intervention.here are two driving forces for all chemical reactions. The first is enthalpy, and the second is entropy. Entropy (D S) is a measure of the disorder of a system, and systems tend to favor a more disordered system: nature tends toward chaos. Spontaneous reactions occur without outside intervention.
http://www.sparknotes.com/testprep/books/sat2/chemistry/chapter9section2.rhtml
spontaneous helping definition
Spontaneous helping means proceeding from natural feeling or native tendency without external constraint.