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This question already has an answer here:

I was wondering why a balloon explodes after some time by itself with no specific reason. yesterday I was doing my chores and to my amazement the balloon far in the corner of house pop with no obvious reason.(the temperature had not changed before its explosion/usual conditions) I mean atmospheric pressure and pressure in balloon and force which balloon itself pushes are in an equilibrium. So what happens?

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marked as duplicate by RedGrittyBrick, ACuriousMind, John Rennie, user36790, Kyle Kanos Mar 11 '16 at 3:15

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    $\begingroup$ possible duplicate: physics.stackexchange.com/q/41521 $\endgroup$ – Jaywalker Mar 10 '16 at 9:55
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    $\begingroup$ Try to look for similar questions on the website before asking your own $\endgroup$ – Jaywalker Mar 10 '16 at 9:56
  • $\begingroup$ my question was a bit different $\endgroup$ – Abbas Shojakani Mar 12 '16 at 16:14
  • $\begingroup$ sorry for my bad English $\endgroup$ – Abbas Shojakani Mar 12 '16 at 16:14
  • $\begingroup$ I clarified my question . $\endgroup$ – Abbas Shojakani Mar 12 '16 at 16:15
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I think that since the balloon is in tension all the time so the molecular bonds go weaker and weaker so it explodes at last.

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    $\begingroup$ This is essentially correct. Nanoscopic tears may form under the tension. And once they form, the stress causes them to grow until...POP!! $\endgroup$ – lemon Mar 10 '16 at 7:57

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