I know you're supposed to show your attempt at a problem before asking for general help but I don't know where to start with this! Could someone please show me some pointers or at least set me in the right direction on how to start and do these problems?
Use Hess’ Law to find the change in enthalpy for the following reaction:
3NO(g) N2O(g) + NO2(g) ΔH = ?
Given:
1. 2NO(g) N2(g) + O2(g) ΔH = -180.7 kJ
2. 2NO2(g) 2NO(g) + O2(g) ΔH = 113.1 kJ
3. 2N2(g) + O2(g) 2N2O(g) ΔH = 163.2 kJ
ΔH = ?
&
25 mL of 1.50 M NaOH and 25 mL of 1.50M HCl are placed in a calorimeter; both are initially at 24.0oC. After stirring, the final temperature is 34.2oC. Calculate qsolution, qreaction and ΔHreaction (in kJ/mol). Assume the density of the solution is 1.00 g/mL and the specific heat of the solution is 4.18 J/goC. Pay close attention to the signs of these values.