Question

Using Hess's Law to Calculate a Standard Enthalpy of Formation On the Solution Calorimetry Lab Report Form, vou will be asked to calculate a standard enthalpy of formation for magnesium oxide based on your experimental results. Below is an example of how to do this type of calculation. Calculate the standard enthalpy of formation of gaseous diborane (B2H6) using the following thermochemical equations: 4 B(s) + 3 O2(g)-> 2 B2O3(s) 2 H2(g) + O2(g) > 2 H20(0) B2H6(8) +3 O2(g) B203(s) + 3 H20) AHo-2147.5 kJ/mol ArH -2509.1 kJ/mol Aril。=-571.7 kJ/mol Step 1: Write out a balanced equation for the standard enthalpy of formation reaction for B2H6(g). (Remember that phases are important and should be included Step 2: Flip, multiply, and add the thermochemical equations provided above in order to calculate the standard enthalpy of formation for B2H6(g)

Answer 1