Question

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

Answer 1

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.