Is the following reaction exothermic or endothermic? 4Cl ? (aq) + [Co(H 2 O) 6 ]
ID: 752236 • Letter: I
Question
Is the following reaction exothermic or endothermic?4Cl?(aq) + [Co(H2O)6]2+(aq) (red)? [CoCl4]2?(aq) + 6H2O(l) (blue) Is the following reaction exothermic or endothermic?
4Cl?(aq) + [Co(H2O)6]2+(aq) (red)? [CoCl4]2?(aq) + 6H2O(l) (blue)
Explanation / Answer
An exothermic reaction releases energy; in exothermic reactions, heat is a product. Example: When a liquid turns into a solid, such as liquid water turning into ice, it must release energy in order for the water to solidify. That is why ice is colder than regular water, is has less energy, seeing as the liquid released energy to turn into ice. B + C ==> BC + 100 joules An endothermic reaction absorbs energy; in endothermic reactions, heat is a reactant. Example: When a liquid turns into a gas, it must absorb sufficient energy to overcome the intermolecular forces in order for the particles to escape into the gas phase. Consider this reaction: H2O (L) + 2260 joules ==> H2O (g) the notations represented as (L) and (g) show the state of water as liquid or gas. Note: joules is the measurement of heat energy.
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