What is an exothermic reaction and an endothermic reaction?
(N/A) $1$. Exothermic Reaction: $A$ chemical reaction in which energy is released into the surroundings,usually in the form of heat or light. In these reactions,the total energy of the products is less than the total energy of the reactants. Example: Combustion of methane,$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O + \text{Heat}$.
$2$. Endothermic Reaction: $A$ chemical reaction in which energy is absorbed from the surroundings. In these reactions,the total energy of the products is greater than the total energy of the reactants. Example: Photosynthesis,$6CO_2 + 6H_2O + \text{Energy} \rightarrow C_6H_{12}O_6 + 6O_2$.
$2$. Endothermic Reaction: $A$ chemical reaction in which energy is absorbed from the surroundings. In these reactions,the total energy of the products is greater than the total energy of the reactants. Example: Photosynthesis,$6CO_2 + 6H_2O + \text{Energy} \rightarrow C_6H_{12}O_6 + 6O_2$.
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Given below are two statements $ : $
Statement $I :$ When a system containing ice in equilibrium with water $(\text{liquid})$ is heated, heat is absorbed by the system and there is no change in the temperature of the system until whole ice gets melted.
Statement $II :$ At the melting point of ice, there is absorption of heat in order to overcome intermolecular forces of attraction within the molecules of water in ice, and the kinetic energy of molecules is not increased at the melting point.
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Statement $I :$ When a system containing ice in equilibrium with water $(\text{liquid})$ is heated, heat is absorbed by the system and there is no change in the temperature of the system until whole ice gets melted.
Statement $II :$ At the melting point of ice, there is absorption of heat in order to overcome intermolecular forces of attraction within the molecules of water in ice, and the kinetic energy of molecules is not increased at the melting point.
In the light of the above statements, choose the correct answer from the options given below $ : $
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