Question

Calculate the enthalpy change of desorption for a solid substance using the given data: The mass of the substance is 2.5 g, and the temperature change during desorption is 25 °C. The heat capacity of the substance is 1.5 J/g·°C. The molar mass of the substance is 150 g/mol. Assume that the desorption process takes place at constant pressure.

Answer 1

To calculate the enthalpy change of desorption, we can use the formula:H = m  C  Twhere H is the enthalpy change, m is the mass of the substance, C is the heat capacity, and T is the temperature change.Given data:m = 2.5 gC = 1.5 J/gCT = 25 CNow, we can plug in the values into the formula:H =  2.5 g    1.5 J/gC    25 C H = 93.75 JThe enthalpy change of desorption for the solid substance is 93.75 J.