Question
Asked Mar 1, 2020
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In the following reactions, identify the physical states of the products and reactants and indicate whether the reaction consumes heat or liberates heat:

a) NaOH(aq) + HCl(aq) -> H2O(l) + NaCl(aq) + energy

b) 2KClO3(s) + energy -> 2KCl(s) + 3O2(g)

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Expert Answer

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Step 1

Exothermic is the process or reaction that releases energy in the form of heat.

Another way of describing an exothermic reaction is that it is one in which the energy of the products is less than the energy of the reactants, because energy has been released during the reaction. We can represent this using the following general formula:

Reactants → Products + Energy

 

Endothermic is the process or reaction that absorbs energy in the form of heat.

Another way of describing an endothermic reaction is that it is one in which the energy of the products is greater than the energy of the reactants, because energy has been absorbed during the reaction. This can be represented by the following general formula:

Reactants + Energy → Products

Step 2

a) NaOH (aq) + HCl (aq) → H2O (l) + NaCl (aq) + energy

The physical states of the products and reactant are :

Reactants :

NaOH = aqueous state

HCl = aqueous state

 

Products :

H2O = liquid state

NaCl = aqu...

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