The addition of hydrochloric acid to a silver nitrate solution precipitates silver chloride according to the reaction: agno3(aq)+hcl(aq)→agcl(s)+hno3(aq). when you combine 70.0ml of 0.185m agno3 with 70.0ml of 0.185m hcl in a coffee-cup calorimeter, the temperature changes from 23.16∘c to 24.25∘c.. calculate δhrxn for the reaction as written. use 1.00 g/ml as the density of the solution and c=4.18j/g⋅∘c as the specific heat capacity.

The enthalpy change of the reaction is 49305.02 J/mol

Explanation:

To calculate mass of a substance, we use the equation:

We are given:

Density of solution = 1.00 g/mL

Volume of solution = (70.0 + 70.0) mL = 140.0 mL

Putting values in above equation, we get:

where,

q = heat absorbed

m = mass of solution = 140.0 g

c = specific heat capacity of water = 4.184 J/g.°C

= change in temperature =

Putting values in above equation, we get:

Molarity of HCl solution = 0.185 M

Volume of solution = 70.0 mL

Putting values in above equation, we get:

where,

= amount of heat absorbed = 638.5 J

n = number of moles = 0.01295 moles

= enthalpy change of the reaction

Putting values in above equation, we get:

Hence, the enthalpy change of the reaction is 49305.02 J/mol

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