Is Hell exothermic (gives off heat) or endothermic (absorbs heat)?
605366
First, we postulate that you cannot get very far in this life (let alone get Best Answer) simply by copying and pasting someone else's work.  Then, we can plunge into our own whack-azz theory.\n\nIn Yahoo Answers, you have the non-believers saying (to use th term politely) that Hell does not exist.  Which causes the believers to say that yes it does and you better believe it bless your sorry soul, cause it was scribbled down in a book a few thousand years ago. Which causes the non-believers to say what planet did you come from, which causes another flood of bible quotes and blessings.\n\nSo a lot of heat energy goes into the battle over Hell, but at the end, nothing comes out of it, especially when the Yahoo god deletes the arguments.  So in YA, hell is Endothermic.
673440
The activation energy of a reaction is different for every reaction and is totaly independant of wether the reaction is exothermic or endothermic. For any reaction to proceed the minimum energy must be equal to or higher than the activation energy.\n\nNow where your question can come in is, i think, is if the reaction is reversible. In one direction the reaction will be exothermic and in the opposite direction the reaction will be endothermic. For both the forward and backward reactions the activation energy is the same and there is nothing that can be done to change that.
846365
Thermal energy IS heat.
47694
Not much that I know of.\n\nWhat you say about energy is accurate, however, the energy in the body is maintained by chemical reactions which keep the body warm and at 98.6 F. Energy flows out of the body as heat, and exits the surface of the body as infrared radiation. When you die, the chemical reactions slow to a stop, and the cells break down chemically to give up their last ergs of organized energy. The heat produced also radiates away from the body as infrared radiation until the body reaches equilibrium with its environment and absorbs as much infrared 'heat' radiation as it emits.\n\nSo far as we know, that is all there is to the process of death, and there is no violation of energy conservation.\n\nHope this helps,\nUltimeaciax
802722
It is thermodynamic concepts. Where the high temperature resorvior heat energy transfer to low temperature resorvior (cool), that process known as absorbtion. It can be both way either heat or cool absorbing system.
390030
heat mainly - the energy is wasted in the form of heat instead of transferable energy
440509
There are many types exothermic or endothermic reactions.\n\n Exothermic reactions.\n1.Combustion reactions.(Except combustion of Nitrogen.)\n2.Combination reaction of anions & cations.(Ex-OH- + H+)\n3.Reaction of metals with non-metals.\n4.Some(1st) Electron affinity reactions(Expect elements of S2,P6,d10;Nitrogen)\n\n Endothermic reactions\n1.All the ionization reactions.\n2.Bond breaking reactions.\n3.Breaking into anions,cations.\n4.All the Sublimation,Vapuorization,Atomization reaction.\n5.(1st)Electron affinity reactions of S2,P6,d10 elements;Nitrogen\n6.All the 2nd,3rd electron affinity reactions \n\nSo,(a) is a exothermic  reaction\nAnd,(b) is also exothermic reaction
984549
This version of Hell is non-existent.  Hell is an eternity in the absence of God.  Fire and brimstone is a man made myth.
1138895
They are similar, but not exactly the same as exothermic and endothermic as used in chemistry.\n\nExergonic reactions are defined by a negative delta G, that is they have less free energy at the completion of the reaction than at the beginning. An exergonic reaction may require some input of energy (called activation energy) to start the reaction, but will release more energy than is required to start the reaction. \n\nAn endergonic reaction will have a positive delta G, that is it will have more free energy after the reaction than before it starts. \n\nHere is a good website with graphs that explains this:\nhttp://academic.brooklyn.cuny.edu/biology/bio4fv/page/exergon.htm\n\nHere is another website that explains the similarity between exergonic, exothermic, and endergonic, endothermic. \nhttp://www.mansfield.ohio-state.edu/~sabedon/sta5202.htm
107298
Dark substances convert more light energy to heat energy, but also release that energy more quickly.  The heat energy absorbed would be the same in each if they are same in every other way.  So, it depends what you mean by more effective.  Once the fire is out, the black one would give off more hear, but not for as long.  The white one would stay warm longer, but wouldn't give off as much heat.
766931
exothermic=right\nendothermic=left
662425
Heat packs work by utilising exothermic reactions & cold packs work by using endothermic reactions. Meaning that once you start off the reaction, exothermic reactions lose energy & give it off as heat & endothermic reactions require energy & use heat from the surroundings.
316710
well energy is used only in the beginning to start the reaction. otherwise an exothermic reaction will give out tremendous amount of heat energy.
945103
No as far as I know All Cumbustion reactions are exothermic
607425
Yes, provided the conditions are right. For example if the reaction\n\nA + B -> c + d\n\nis exothermic, the reaction in reverse will be endothermic, i.e. you will have to supply the heat.
486588
In chemistry, an exothermic reaction is one that releases heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation:\n   reactants -->product + energy\n\nWhen using a calorimeter, the change in heat of the calorimeter is equal to the opposite of the change in heat of the system. This means that when the solution in which the reaction is taking place gains heat, the reaction is exothermic.\n\nIn an exothermic reaction the total energy absorbed in bond breaking is less than the total energy released in bond making.\n\nThe absolute amount of energy in a chemical system is extremely difficult to measure or calculate. The enthalpy change, ΔH, of a chemical reaction is much easier to measure and calculate. A bomb calorimeter is very suitable for measuring the energy change, ΔH, of a combustion reaction. Measured and calculated ΔH values are related to bond energies by:\n\nΔH = energy used in bond breaking reactions - energy released in bond making products.\n\nFor an exothermic reaction, this gives a negative value for ΔH as a larger value is subtracted from a smaller value. For example, when hydrogen burns:\n\n\nIn Chemistry an endothermic reaction is one in which the products have more energy than the reactants, and thus a net input of energy, usually in the form of heat, is required. Endothermic reactions are often described as reactions that "feel cold", and contrast with exothermic reactions, in which heat is released.\n\nAlthough the process of bond breaking amongst reactants in a chemical process requires an initial input of energy (the activation energy), in the case of an endothermic reaction, the energy released when bonds are formed to create reactants is less than that required to break the bonds in the products; bonding electrons in the products are therefore at a higher energy than the reactants. Heat energy from the material surrounding the reactants is usually what breaks their bonds, so as heat energy is transferred from the surroundings to the reactants, the surroundings get colder. This is often summarized in a chemical equation as follows:\n\nReactants + Energy → Products
247914
since the steam is coming from the inside of the water,\nI beleive it is an endothermic.  Endothermic means the \nheat comes from inside the object, and exothermic means\nfrom outside sources.  I think steam is a product of heat and water, but mainly water because the heated object is the water.  The heating element is being produced oustide the water, but the water itself is what is producing the steam.  (if you see above, "water" is stacked on top 3X)