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How do you predict if a reaction will be exothermic or endothermic?
Although it is hard to predict if a reaction will be exothermic or endothermic, there are many factors that can be considered when trying to determine it. first endothermic reactions usually employ the breaking of strong bonds, and the creation of weak bonds. While exothermic reactions usually break weak bonds and create strong bonds. Sadly these are the only ways to predict if a reaction will be endothermic or exothermic, altough there are other methods that could be used that are much more complex.
What is the first electron affinity of magnesium and is it exothermic or endothermic?
The first electron affinity of magnesium is exothermic. This means that energy is released when a neutral magnesium atom gains an electron to form a magnesium ion.
Is thermal decomposition a endothermic or exothermic reaction?
Thedecompositionof water is endothermic since energy is required to break up the bonds between the hydrogen and oxygen in the water molecule. Therefore the decomposition of water absorbs energy, making the reaction an endothermic one.
Is spontaneous reaction exo or endo?
Reactions are described by this equation: GD = HD - TDS where D = delta for change in values. GD < 0 spontaneous HD < 0 exothermic ; HD > 0 endothermic The first equation is Gibbs free energy. When G is negative, the reaction is spontaneous. In contrast, a positive number G is non spontaneous. The interesting thing is that spontaneous reactions can be EITHER exothermic and endothermic. Lets look at this: lets assume HD has a value of 100. This means TDS would have to be bigger than 100 in order to make GD a negative number. An endothermic reaction which has a positive H can still be exothermic. Here's another way to pose your question: Is an exothermic reaction spontaneous? Always. Is an endothermic reaction spontaneous? This can be either.
To dissolve an ionic solid in water, you must first disrupt the ionic bonds holding the ionic lattice together This is an endothermic process Yet many ionic solids have an exothermic heat of solutio?
In order to dissolve an ionic solid in water, the endothermic process of breaking the ionic bonds holding the lattice together is followed by the exothermic heat of solution when the ions are hydrated by water molecules. The overall process can be exothermic or endothermic depending on the relative magnitudes of the energy changes involved in breaking the ionic bonds and hydrating the ions.
Is run-off exothermic or endothermic?
yes, as are all mammals. The definition of endothermic is: "... a process or reaction that absorbs energy in the form of heat." (From Wikipedia) So humans can be endothermic if their bodies are absorbing energy from their surroundings. For the most part, humans are exothermic, meaning they release heat energy to their surroundings. Too much time being endothermic and hyperthermia sets in. Our bodies generally need to get rid of excess heat energy. So even if we are in 100 (F) temperature, our bodies still must rid themselves of excess heat. We do so with the aid of evaporating sweat. (And air conditioning, which happens to absorb energy through the evaporation of refrigerant) I wonder if the OP (and the first responder) were using endothermic to represent warm-blooded.
Are melting and freezing physical changes are endothermic?
Freezing is an endothermic change. Freezing, for example a puddle of ice turn into an ice cube, the water is still the same thing but its just in a different form. The water is going into a different form, which is called endothermic. Hope this helped :)!
What was the name of the first packet of crisps?
Hi there When was the first packet of crisps made in Great Britain and what was the name of the packet of crisps. thank you
How made the first packet of crisps in Britain?
Hi there When was the first packet of crisps made in Great Britain and what was the name of the packet of crisps. thank you
What is chemical reaction that gives off heat called?
Exothermic reactions give off heat.
Can someone explain why chemical reactions will either release or absorb energy?
The Law of Conservation of Energy says that the total amount of energy in a system has to remain the same - usually expressed as "energy cannot be created or destroyed". In molecules, the bonds between the atoms have a lot of stored energy in them. In order to break a bond, you have to put in a little energy, but then the energy stored in those bonds is released and available to use. When you run a chemical reaction, you have two steps. First, you have to break the original bonds. This process is exothermic - it releases energy. Second, you have to make new bonds. This process is endothermic - it absorbs energy. What determines whether a reaction absorbs or releases energy is the balance between the two. Hydrogen gas and oxygen gas both contain a lot of energy, while water only contains a little bit of energy. Converting from hydrogen and oxygen to water is exothermic, while converting from water to hydrogen and oxygen is endothermic.
What is an example of an endothermic chemical change?
An endothermic reaction is one that requires energy to take place (e.g. light or heat energy); breaking bonds in a molecule is always endothermic; and energy is a reactant.Some examples of endothermic reactions are as follows:citric acid and sodium bicarbonate.ammonium chloride and watera chemical cold pack used in first aid kitsphotosynthesisbioluminescence by a firefly
