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Chemistry Homework Help: Thermodynamics?
How much energy can be produced when we react 100 mL of 2M HCl with sufficient NaOH solution given that:
NaOH(aq) + HCl(aq) -------> NaCl(aq) + H2O(aq) ?H= -56.2kJ/mol HCl
Please show me all the steps and formulas required, because I have to answer some more questions like this!
Thank you!
1 Answer
- Simonizer1218Lv 76 years agoFavorite Answer
The ∆H of -56.2 kJ/mol HCl can be used to calculate ∆H when 100 ml of 2 M HCl is used. First, find the number of moles of HCl reacting, and then multiply that by the kJ/mole.
100 ml x 1 L/1000 ml x 2 mol/L = 0.2 moles HCl used
0.2 moles HCl x -56.2 kJ/mol HCl = -11.2 kJ of energy is liberated. The - sign shows that the reaction is exothermic, and heat (energy) is liberated (produced).
