Concept explainers
(a)
Interpretation:
Whether heat is absorbed or released during melting of 100 g of ice needs to be determined.
Concept Introduction:
When in a
(b)
Interpretation:
Whether heat is absorbed or released during freezing of 25g of water needs to be determined.
Concept Introduction:
When in a chemical reaction, energy is required to form products from reactants, the reaction is known as endothermic and if energy is released, it is known as an exothermic reaction.
(c)
Interpretation:
Whether heat is absorbed or released during condensation of 20 g steam needs to be determined.
Concept Introduction:
When in a chemical reaction, energy is required to form products from reactants, the reaction is known as endothermic and if energy is released, it is known as an exothermic reaction.
(d)
Interpretation:
Whether heat is absorbed or released during vaporizing 30 g water needs to be determined.
Concept Introduction:
When in a chemical reaction, energy is required to form products from reactants, the reaction is known as endothermic and if energy is released, it is known as an exothermic reaction.
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