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Enthalpy of Combustion

What will be ...

Question

What will be the products of combustion of hydrocarbon at $298 K$ ? .

A

C O_{2} (g), H_{2} O (l)

.

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B

C O_{2} (l), H_{2} O (l)

.

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C

C O_{2} (g), H O (l)

.

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D

None of these

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Solution

The correct option is A $C O_{2} (g), H_{2} O (l)$ .
The combustion of hydrocarbons at $298 K$ gives rise to $C O_{2} (g)$ and $H_{2} O (l)$ .
$C_{x} H_{y}$ + $(x + \frac{y}{4}) O_{2}$ $\to$ $x C O_{2}$ + $\frac{y}{2} H_{2} O$

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