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How do exothermic and endothermic reactions compare?
An endothermic reaction takes place when energy is absorbed from surroundings in the form of heat, and exothermic is when energy is released from the system into the surroundings. Endothermic absorbs heat, and exothermic produces heat.
What is the connect between Endo and exothermic reactions and chemical bonds?
For an endothermic chemical reaction to proceed, the reactants must absorb energy from their environment to be converted to products. In an exothermic reaction, the bonds in the product have higher bond energy (stronger bonds) than the reactants.
Think of this as an amount of heat leaving (or being subtracted from) the reaction. If a reaction absorbs or uses more energy than it releases, the reaction is endothermic, and enthalpy will be positive. This means combustion has an overall negative enthalpy and is an exothermic reaction.
What is the opposite of exothermic?
An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. The opposite of an endothermic process is an exothermic process, one that releases or “gives out” energy, usually in the form of heat and sometimes as electrical energy.
Is bond breaking endothermic?
Bond-breaking is an endothermic process. Energy is released when new bonds form. Bond-making is an exothermic process. Whether a reaction is endothermic or exothermic depends on the difference between the energy needed to break bonds and the energy released when new bonds form.
What chemical reactions are endothermic?
An endothermic process is any process which requires or absorbs energy from its surroundings, usually in the form of heat. It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process, such as the melting of ice cubes.
Which of the processes is exothermic?
In thermodynamics , the term exothermic process (exo- : “outside”) describes a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity (e.g. a battery), or sound (e.g. explosion heard when burning hydrogen).
What is the formula for an exothermic reaction?
The characteristics of an exothermic reaction can be expressed with the general chemical equation: reactants → products + energy; so an exothermic reaction results in the chemical product and a release of energy.
What happens during an exothermic reaction?
An exothermic reaction is a reaction in which energy is released in the form of light or heat. Thus in an exothermic reaction, energy is transferred into the surroundings rather than taking energy from the surroundings as in an endothermic reaction.