Reaction in a Flask

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RuchaDeshpande1L
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Reaction in a Flask

Postby RuchaDeshpande1L » Wed Jan 10, 2018 5:46 pm

I understand that if an exothermic reaction is occurring in a flask, energy is given off and thus the flask feels warm. However, can someone explain why an endothermic reaction occurring in a flask feels cool? I thought that endothermic reactions need to take in energy to occur.

Hubert Tang-1H
Posts: 44
Joined: Thu Jul 27, 2017 3:00 am

Re: Reaction in a Flask

Postby Hubert Tang-1H » Wed Jan 10, 2018 5:52 pm

Endothermic reactions absorb heat, and in most cases, this heat is taken from the surroundings. In this case, the flask is considered the surroundings of the reaction (that's why the exothermic reaction, which releases heat, warms the flask/surroundings). The endothermic reaction absorbs the heat from the flask, which makes the flask feel cold.

Chew 2H
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Joined: Fri Sep 29, 2017 7:05 am

Re: Reaction in a Flask

Postby Chew 2H » Wed Jan 10, 2018 5:52 pm

Endothermic reaction in a flask feels cool because endothermic reactions use up energy(heat) from the surrounding. Therefore the surroundings loses heat and cools down.

Sarah 2F
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Joined: Fri Sep 29, 2017 7:06 am

Re: Reaction in a Flask

Postby Sarah 2F » Wed Jan 10, 2018 7:27 pm

Endothermic reactions feel cold because it is taking energy from the surroundings. Your hand may be a part of the surroundings and so if you become in contact with it, it will feel cool because it is taking energy/heat from your hand into its system. This is why endothermic reactions feel cold.

Xin He 2L
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Re: Reaction in a Flask

Postby Xin He 2L » Wed Jan 10, 2018 7:44 pm

An endothermic reaction requires heat(energy) to occur, so the reaction draws heat from its surrounding, making it cool.

Phillip Winters 2F
Posts: 50
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Re: Reaction in a Flask

Postby Phillip Winters 2F » Wed Jan 10, 2018 9:09 pm

Endothermic reactions involve the absorption of heat, so whatever is in the flask will take the heat from the flask, making the flask cold


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