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The temp. at which rhombic sulphur and m...

The temp. at which rhombic sulphur and monoclinic sulphur exist in equilibrium is

A

`98^@C`

B

`95.5^@C`

C

`240^@C`

D

`120^@C`

Text Solution

Verified by Experts

The correct Answer is:
B
Rhombic Sulphur ` underset(larr)overset(95.5^@C)(rarr)` Monoclinic sulphur.
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Sulphur exists is more than one solid form. The stable form at room temperature is rhombic sulphur. But above room temperature the following reaction occurs. S(rhombic) to S(monoclinic) If DeltaH = 276.144 J at 298 K and 1 atm and DeltaG = 75.312 J (a) Calculate DeltaS at 298 K. (b) Assume that DeltaH and DeltaS do not vary significantly with temperature, calcualte T_(eq) , the temperature at which rhombic and monoclinic sulphur exist in equilibrium with each other.

Sulphur exists in more than one solid form. The stable form at room temperature is rhombic sulphur. But above room temperature the following reaction occurs : S (rhombic) rarr S (monoclinic) If Delta H = 276.144 J at 298 K and 1 atm and Delta G = 75.312 J Assume that Delta H and Delta S do not vary significantly with temperature, calculate T_(eq) , the temperature at which rhombic and monoclinic sulphur exist in equilibrium with each other.

Knowledge Check

  • Transition temperature between rhombic and monoclinic sulphur is

    A
    `26^(@)C`
    B
    `95.6^(@)C`
    C
    `70^(@)C`
    D
    `100^(@)C`

  • Atomicity of sulphur in rhombic sulphur is

    A
    1
    B
    2
    C
    4
    D
    8

  • Rhombic sulphur consists of

    A
    `S_(8)` chains
    B
    `S_(2)` molecules
    C
    `S_(4)` rings
    D
    `S_(8)` rings

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