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

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.