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21 July, 21:53

Calculate the change in the enthalpy and the change in entropy when 1 mole of sic is heated from 25 ° c to 1000 °

c. the constant pressure molar heat capacity of sic varies with temperature as

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  1. 21 July, 22:17
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    The SiC here is the chemical formula for silicon carbide. At the given temperature, the compound is in solid form. The heat needed to heat up the element from T₁ to T₂ is calculated through the equation,

    ΔH = ncp (T₂ - T₁)

    where ΔH is enthalpy, n is the number of moles, cp is the specific heat. From reliable source, the specific heat of the silicon carbide is equal to 1.34 J/mol°C.

    Substituting the known values to the equation,

    ΔH = (1 mole) (1.34 J/mol°C) (1000°C - 25°C)

    ΔH = 1306.5 J

    Thus, the heat needed is equal to 1306.5 J.
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