4D7

[Miguel Hernandez LEC 3]

Oxygen difluoride is a colorless, very poisonous gas that
reacts rapidly and exothermically with water vapor to produce O2
and HF:
What is the change in internal energy for the reaction of 1.00 mol
OF2

I understand that the equation we should use for this problem is delta U = - delta H + PV. But I do not understand under what conditions this equation should be used. and I am also confused on how we calculate work without delta V as it is shown in the Formula Sheet. Thanks.

[Calvin Chen 1L]

Use the ideal gas law PV = nRT to calculate the value for PV. You have the moles of gas produced from the problem, the gas constant and the temperature. Check the solutions manual in the module for more details.