Match each reaction in Column I with the name of its enthalpy change in Column II: Column I (Reaction) Column II (Name of Δ H ) (P) CH 3 OH ( l ) + 2 3 O 2 ( g ) → CO 2 ( g ) + 2 H 2 O ( l )

Question

Match each reaction in Column I with the name of its enthalpy change in Column II:

Column I (Reaction)	Column II (Name of $Δ H$ )
(P) $CH_{3} OH (l) + \frac{3}{2} O_{2} (g) \to CO_{2} (g) + 2 H_{2} O (l)$	(1) Heat of solution
(Q) $\frac{1}{2} H_{2} (g) + \frac{1}{2} Br_{2} (l) \to HBr (g)$	(2) Heat of neutralisation
(R) $KCl (s) + aq \to KCl (a q)$	(3) Heat of formation
(S) $HNO_{3} (a q) + KOH (a q) \to KNO_{3} (a q) + H_{2} O (l)$	(4) Heat of combustion

Choose the option with the correct matching:

TestHub · Accepted Answer

(P) The fuel burns completely in oxygen: heat of combustion (4).

(Q) One mole of $HBr (g)$ forms from its elements in standard states ( $Br_{2}$ is a liquid): heat of formation (3). (R) Salt dissolves in water: heat of solution (1).

(S) Strong acid with strong base gives 1 mol $H_{2} O$ : heat of neutralisation (2). Correct matching: P→4; Q→3; R→1; S→2. Answer: (B).

Chemistry - Thermochemistry Question with Solution | TestHub

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