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Heat

Heat

(Science: chemistry) energy transferred between two objects because of a temperature difference, the thermal motion of atoms and molecules. For chemical systems the sign for heat flow into the system is positive, because this process increases the internal energy of the system. Heat flowing out of the system is defined to be negative, since this process decreases the internal energy of the system. A form of energy that is transferred by a difference in temperature.


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Re: Food to ATP energy?

... in that process. So, the 30 moles of ATP produced can only be converted into 219 kilocalories. That means glucose oxidation releases most of its heat during the process of making ATP (Lucky you!) . Now, 7.3kilocalories is the same as 7,300 calories (or 7.3 Calories with a capital "C").

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by tmbirkhead
Thu Aug 14, 2014 1:11 am
 
Forum: Cell Biology
Topic: Food to ATP energy?
Replies: 2
Views: 636

Food to ATP energy?

... of calories worth per day if you are to believe the link)? And how is all this energy surplus used? There is no way so much of it is lost to heat as I also read that the energy efficiency of the human body is around 25%. Can it be used at all or is it lost in some other way? Thanks.

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by Viktor
Fri Jun 27, 2014 10:50 pm
 
Forum: Cell Biology
Topic: Food to ATP energy?
Replies: 2
Views: 636

Re: sterilization in microwave oven

... than wash instruments in soap and water. The method of 'inspissation' came into use after the turn of the 20th century. A culture medium would be heated to boiling and then held at room temperature or even incubated for a few hours to a day or two. The heat killed all vegetative forms, and the ...

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by fdgsr
Tue Mar 18, 2014 3:13 pm
 
Forum: Microbiology
Topic: sterilization in microwave oven
Replies: 29
Views: 100872

Re: Re:

... to extinguish it? I assume whatever chemical imbalance that caused the combustion, had been used up within a second or so, but the remaining heat allowed for the skin to catch fire and go on from there, where it was put out like a normal fire, but there was fire damage on the inside of the ...

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by Coelacanth
Sat Feb 22, 2014 10:36 pm
 
Forum: General Discussion
Topic: [News] Frank Baker survives ''spontaneous combustion''
Replies: 5
Views: 1993

Re:

... happens is a metabolic runaway event or a chemical reaction. the nerves produce small currents but even though small those currents generate some heat and a short-circuit of the nervous system is thought of as another possible cause for the source of heat .

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by Coelacanth
Fri Jan 03, 2014 1:53 pm
 
Forum: General Discussion
Topic: Help! I'm freaking out so badly please answer this!
Replies: 14
Views: 4461
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