When 500 ml of 0.100 magno3 is combined with 500 ml of hcl in a coffee-cup calorimeter, the temperature changes from 23.40 ? c to 24.21 ? c. calculate ? hrxn 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.

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm