Which of the following compounds will absorb | vedclass

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(C) The heat of solution $(\Delta H_s)$ represents the enthalpy change when a substance dissolves in a solvent.If $\Delta H_s$ is positive,the process

Vedclass · Accepted Answer

$NH_4NO_3$ $(\Delta H = +25.5 \, kJ/mole)$

Vedclass · Answer

(C) The heat of solution $(\Delta H_s)$ represents the enthalpy change when a substance dissolves in a solvent.If $\Delta H_s$ is positive,the process is endothermic,meaning heat is absorbed from the surroundings.If $\Delta H_s$ is negative,the process is exothermic,meaning heat is released.To absorb the maximum quantity of heat,the compound must have the most positive value of $\Delta H_s$.Comparing the given values: $HNO_3$ $(-33)$,$KCl$ $(+17.64)$,$NH_4NO_3$ $(+25.5)$,and $HCl$ $(-74.1)$.The compound $NH_4NO_3$ has the highest positive value of $\Delta H_s$ $(+25.5 \, kJ/mole)$,therefore it absorbs the maximum amount of heat.

Which of the following compounds will absorb the maximum quantity of heat when dissolved in the same amount of water? The heats of solution of these compounds at $25 \, ^\circ C$ in $kJ/mole$ of each solute are given in brackets.

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