Endothermic
In a polymerase chain reaction (PCR), the key components required include DNA templates, primers, nucleotides, and a DNA polymerase enzyme. However, one component that is NOT required for PCR to occur is a living cell, as the reaction can take place in vitro (outside of a living organism).
exothermic reaction
The type of reaction that absorbs energy is endothermic. This process takes the energy from its surroundings, absorbs it, and creates heat.
A common type of chemical reaction that doesn't involve heat is a precipitation reaction, where two soluble compounds in a solution react to form an insoluble solid called a precipitate. Other examples include acid-base reactions and redox reactions, which can occur without the need for external heat sources.
Decomposition reaction: CaCO3(s) --(heat)--> CaOs + CO2(g)
In a polymerase chain reaction (PCR), the key components required include DNA templates, primers, nucleotides, and a DNA polymerase enzyme. However, one component that is NOT required for PCR to occur is a living cell, as the reaction can take place in vitro (outside of a living organism).
Burning flames and explosions typically occur in exothermic reactions where heat is released, such as combustion reactions. These reactions involve a rapid release of energy in the form of heat and light.
This is an exothermic reaction.
A chemical reaction
exothermic reaction
The type of reaction that involves oxygen and produces light and heat is a combustion reaction.
exothermic reaction. This type of reaction releases energy to the surroundings as heat.
Exothermic reaction gives free heat (energy).
an exothermic reaction
The type of reaction that absorbs energy is endothermic. This process takes the energy from its surroundings, absorbs it, and creates heat.
A common type of chemical reaction that doesn't involve heat is a precipitation reaction, where two soluble compounds in a solution react to form an insoluble solid called a precipitate. Other examples include acid-base reactions and redox reactions, which can occur without the need for external heat sources.
Decomposition reaction: CaCO3(s) --(heat)--> CaOs + CO2(g)