The heat change for the reaction- Cs-2Ss- CS 2 lis known as-

The correct option is C heat of formation of CS _ 2 (l) Heat of formation → The standard heat of formation is defined as the amount of heat absorbed ...

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Standard XII

Chemistry

Heat of Reaction

The heat chan...

Question

The heat change for the reaction,
$C (s) + 2 S (s) \to {C S}_{2} (l)$
is known as:

heat of transition of C

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heat of fusion of

{C S}_{2} (l)

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heat of formation of

{C S}_{2} (l)

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heat of vaporisation of

{C S}_{2} (l)

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Solution

The correct option is C heat of formation of ${C S}_{2} (l)$
Heat of formation $\to$ The standard heat of formation is defined as the amount of heat absorbed or evolved when one mole of a compound is formed from its constituent elements, each substance being in its normal physical state (gas, liquid or solid).
$C_{(s)} + 2 S_{(s)} ⟶ {C S_{2}}_{(l)}$
In the above reaction, 1 mole of $C S_{2}$ is formed from its constituent elements in their normal state. Hence, the heat change for the given reaction represents heat of formation.

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Similar questions

Q. The heat change for the reaction:

C (s) + S (s) \to C S_{2} (l)

, known as:

Q. Given,

C (s) + O_{2} (g) \to {C O}_{2} (g); Δ H = - 395 k J

S (s) + O_{2} (g) \to {S O}_{2} (g); Δ H = - 295 k J

C S_{2} (l) + 3 O_{2} (g) \to {C O}_{2} (g) + 2 {S O}_{2} (g); Δ H = - 1110 k J

The heat of formation of

C S_{2} (l)

is:

Q. A standard heat of formation of CS2 (I) will be:, given that the standard heat combustion of carbon(s), Sulphur(s) and

C S_{2} (l)

are

- 393.3, - 293.72 a n d - 1108.76 K j / m o l

respectively.

Q. In the reaction

C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g) Δ H = - 265 k c a l

. The enthalpies of formation of

C O_{2}

and

S O_{2}

are both negative and are in the ratio 4 : 3. The enthalpy of formation of

C S_{2}

is + 26 kcal/mol. Calculate the enthalpy of formation of

S O_{2}

In the reaction

$C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g) Δ H = - 265 k c a l$

The enthalpies of formation of $C O_{2}$ and $S O_{2}$ are both negative and are in the ratio 4 : 3. The enthalpy of formation of $C S_{2}$ is $+ 26 k c a l / m o l$ . Calculate the enthalpy of formation of $S O_{2}$ .

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The heat change for the reaction,C(s)+2S(s)→CS2(l)is known as:

The heat change for the reaction,
$C (s) + 2 S (s) \to {C S}_{2} (l)$
is known as: