Hrxn = -m csystem δt

0.7180 ± 0.0002 g of kno3 was added to 100.00 ± 0.02 g of h2o in a solution calorimeter.

csystem = 121.46 ± 1.23 cal/°c and δt = -0.508 ± 0.009 °c.

(a) (1 pt) calculate the molar enthalpy change δh~rxn for the dissolution of kno3 in water.

(b) (2 pts) calculate in the error in δh~

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.