Enthalpy of Formation

Question

The standard heat of formation for CaCl₂(s) is -796 kJ/mol at 298 K. Write the formation equation for CaCl₂(s) that goes with this value of ΔH°.

Use the pull-down boxes to specify states. Write fractions with a slash, such as 1/2 for one half. If a box is not needed leave it blank.

Answer 1

Ca(s) + Cl₂(g) ==> CaCl₂(s). ΔH = -796 kJ

The standard enthalpy (heat) of formation refers to the enthalpy change when one mole of a compound is formed from its elements, each in their standard state.