A scientist measures the standard enthalpy change for the following reaction to be 67.9 kJ: Fe2O3(s) + 3 H2(
92Fe(s) + 3 H2O(9)
Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation
of H2O(g) is
kJ/mol.

The standard enthalpy of formation  of is  -252.1 kJ/mol.

Explanation:

The balanced chemical reaction is,

The expression for enthalpy change is,

Putting the values we get :

Thus standard enthalpy of formation  of is  -252.1 kJ/mol.

the answer is true.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.