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Need help with General Chemistry problem it involves thermochemistry and Hess's law?

Need help with General Chemistry problem it involves thermochemistry and Hess's law? - Chemistry Forum

Need help with General Chemistry problem it involves thermochemistry and Hess's law? - Chemistry Forum. Discuss chemical reactions, chemistry.


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Old 06-17-2009, 09:16 PM
Pipette Filler
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Default Need help with General Chemistry problem it involves thermochemistry and Hess's law?



Any help you can give me is appreciated this problem is due tomorrow and I dont understand this at all.
The reaction of 0.284 g of magnesium with 100 ml of 1.00 M hydrochloric acid raises the temperature of the reaction solution from 19.4 C to 32.8 C. The specific heat and density of HCl are 3.93 J g-1 C-1 and 1.02 g ml-1.
Mg (s) + 2HCl (aq) MgCl2 (aq) + H2 (g)

Which is the limiting reactant in this experiment? Show your calculations.

If this experiment was performed in a calorimeter with a heat capacity of 412 J K-1, what would be the heat absorbed by the calorimeter in this experiment?

What would be the heat absorbed by the solution?

What would be the heat liberated by the chemical reaction?

Calculate Delta H for the balanced reaction between Mg and HCl
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