Question

chemistry homework helpIf the heat of formation of 1 mol of CH3OH is -201.3KJ how much heat is exchanged when 43 g are formed?

Answer 1

-270.16kJ

Explanations:

The formula for calculating the mole of a compound is expressed as:

`mole=\frac{mass}{molar\text{ mass}}`

Determine the mole of 43g of CH3OH

`\begin{gathered} mole\text{ of CH}_3OH=\frac{43g}{32.04g\text{/mol}} \\ mole\text{ of CH}_3OH=1.342moles \end{gathered}`

If the heat of formation of 1 mol of CH3OH is -201.3KJ, the amount of heat formed by 1.342moles of the same compound is given as:

`\begin{gathered} heat\text{ formed}=1.342moles*-201.3kJ \\ heat\text{ formed}=-270.16kJ \end{gathered}`

Therefore -270.16kJ heat is exchanged when 43g are formed'