In the following reaction - H is-H 2 O s - H 2 O l - - H -6-00 kj mpl -1A- Standard enthalpy changeB- Enthalpy of fusionC- Enthalpy of vaporizationD- Enthalpy of sublimation

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Standard IX

Chemistry

Sublimation

In the follow...

Question

In the following reaction ∆H is:

H₂O(s) → H₂O (l); ∆H = 6.00 kj mpl^-1

Standard enthalpy change

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Enthalpy of fusion

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Enthalpy of vaporization

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Enthalpy of sublimation

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Solution

The correct option is B
Enthalpy of fusion

The melting of ice takes place at constant pressure and during this phase change; temperature is also constant so ∆H represents the standard enthalpy of fusion.

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Similar questions

Q. The enthalpy change for the reaction,

C_{2} H_{4} (g) + 3 O_{2} (g) ⟶ 2 C O_{2} (g) + 2 H_{2} O (g)

is called:

Enthalpy of sublimation of a substance is equal to
(a) enthalpy of fusion + enthalpy of vaporisation
(b) enthalpy of fusion
(c) enthalpy of vaporisation
(d) twice the enthalpy of vaporisation

H_{2 (g)} + \frac{1}{2} O_{2 (g)} \to H_{2} O_{(l)}

;

Δ H = - 286.2 k J

;

H_{2} O_{(l)} \to H_{(a q)}^{+} + O H_{(a q)}^{-}

;

Δ H = + 57.3 k J

. Enthalpy of ionisation of

O H^{-}

in aqueous solution is:

Q. Consider the following reactions :

H^{+} (a q) + O H^{-} (a q) = H_{2} O (l); Δ H = - X_{1} k J . m o l^{- 1}

II)

H_{2} (g) + \frac{1}{2} O_{2} (g) = H_{2} O (l); Δ H = - X_{2} k J . m o l^{- 1}

III)

C O_{2} (g) + H_{2} (g) = C O (g) + H_{2} O (l); Δ H = + X_{3} k J . m o l^{- 1}

IV)

C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) = 2 C O (g) + H_{2} O (l); Δ H = + X_{4} k J . m o l^{- 1}

Enthalpy of formation of

H_{2} O (l)

is:

Q. The enthalpy of vaporisation of liquid water using data:

H_{2 (g)} + 1 / 2 O_{2 (g)} ⟶ {H_{2} O}_{(l)}; Δ H = - 285.77 k J / m o l e

H_{2 (g)} + 1 / 2 O_{2 (g)} ⟶ {H_{2} O}_{(l)}; Δ H = - 241.84 k J / m o l e

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In the following reaction ∆H is: H2O(s) → H2O (l); ∆H = 6.00 kj mpl-1

The correct option is B Enthalpy of fusion The melting of ice takes place at constant pressure and during this phase change; temperature is also constant so ∆H represents the standard enthalpy of fusion.

In the following reaction ∆H is:

H₂O(s) → H₂O (l); ∆H = 6.00 kj mpl^-1

The correct option is B
Enthalpy of fusion

The melting of ice takes place at constant pressure and during this phase change; temperature is also constant so ∆H represents the standard enthalpy of fusion.