Question

To make a metal sulphide ready for leaching roasting is usually used as an oxidising pre treatment method. in the roasting of copper sulfide(cus), which can be represented in the chemical equation (s) o2( g)→cuo(s) so2( g) determine the standard heat of reaction at 25∘c and at 550∘c.

Answer 1

The roasting of copper sulfide (CuS) is represented by the equation 2CuS(s) + 3O2(g) -> 2CuO(s) + 2SO2(g). The standard heat of reaction can be determined using the standard enthalpy of formation of the reactants and products. The heat of reaction at 550°C can be calculated using the change in heat capacity with temperature.

Step-by-step explanation:

The roasting of copper sulfide (CuS) can be represented by the chemical equation:

2CuS(s) + 3O2(g) → 2CuO(s) + 2SO2(g)

The standard heat of reaction, ΔH°, can be determined using the standard enthalpy of formation of the reactants and products. At 25°C, the standard heat of reaction is the difference between the sum of the standard enthalpies of formation of the products and the sum of the standard enthalpies of formation of the reactants.

At 550°C, the standard heat of reaction can be affected by the change in temperature. The enthalpy change of the reaction can be calculated using the equation:

ΔH = ΔH° + ΔCp(T - T0)

where ΔH° is the standard heat of reaction at 25°C, ΔCp is the change in heat capacity with temperature, T is the final temperature (550°C), and T0 is the initial temperature (25°C).