lab report for Hess's law
I am currently doing a lab report for Hess's law and have got overall temperature changes for the following 3 reactions:
Reaction 1: NaOH(aq) + HCl(aq)→H2O(l) + NaCl(aq) (-1.2 C)
Reaction 2: NaOH(aq) + NH4Cl(aq)→NH3(g) + NaCl(aq) + H2O(l) (-1.0 C)
Reaction 3: NH3(g) + HCl(aq)→ NH4Cl(aq) (-1.45 C)
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We have been instructed to calculate q for the reaction of each using the following equation (q = mass of solution x specific heat x change in temp)
Also to calculate the change in enthalpy using q/moles of solution in product
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We have been given the value of 4.184 as the specific heat, and told to use density to calculate mass (1.02g/mol / 1 was used in an example). The molarity of each solution is 2 and 10ml of each reactant was used.
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I am just a bit unclear of how to go about these calculations, in terms of working out the density and moles of solution. The answers that I calculated are miles away from the theoretical value for the final equation
Can anyone help?
Answers
Status NEW
Posted 15 May 2017 03:05 AM
My Price 7.00
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file 1494818798-Solutions file.docx preview (56 words )
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