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Enthalpy

Which halogen...

Question

Which halogen in its standard state has the greatest absolute entropy per mole?

A

F_{2} (g)

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B

{C l}_{2} (g)

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C

{B r}_{2} (l)

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D

I_{2} (s)

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Solution

The correct option is B ${C l}_{2} (g)$
$Chlorine gas has the greatest absolute entropy per mole.$

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Similar questions

Q. Which halogen in its reference state will have greatest absolute entropy per mole?

Q. Standard reduction potentials of the half reactions are given below

F_{2 (g)} + 2 e^{-} \to 2 F_{(a q)}^{-}

E^{o} = + 2.85 V

C l_{2 (g)} + 2 e^{-} \to 2 C l_{(a q)}^{-}

E^{o} = + 1.36 V

B r_{2 (l)} + 2 e^{-} \to 2 B r_{(a q)}^{-}

E^{o} = + 1.06 V

I_{2 (s)} + 2 e^{-} \to 2 I_{(a q)}^{-}

E^{o} = + 0.53 V

The strongest oxidising and reducing agents respectively are:

Q. The standard absolute entropy of a substance ,

(S^{⊖})

is the entropy of the substance in its standard state at

1

atm, temperature being :

Q. Which has larger absolute entropy per mole?

H_{2} O (l) a t 298 K

H_{2} O (l) a t 350 K

N_{2}

N O b o t h a t 298 K

.

Q. Calculate the free energy change at

298 K

for the reaction :

B r_{2} (l) + C l_{2} (g) \to 2 B r C l (g)

. For the reaction

Δ H^{o} = 29.3 k J

& the entropies of

B r_{2} (l), C l_{2} (g)

& BrCl(g) at the

298 K

152.3, 223.0, 239.7

J m o l^{1} K^{1}

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