Author Question: Calculate the standard enthalpy of sublimation (sub H) at 298K for water using the following ... (Read 56 times)

storky111 · **on:** Aug 27, 2018

Calculate the standard enthalpy of sublimation (sub H) at 298K for water using the following thermochemical equations

H2O(s) = H2O(l); fus H = +6.1 kJ mol-1
H2O(l) = H2O(g); vap H = +44.0 kJ mol-1

A) +37.9 kJ mol-1
B) -37.9 kJ mol-1
C) +50.1 kJ mol-1
D) +44.0 kJ mol-1

Question 2

Which one of the following is the strongest weak acid?

A) HCN (Ka = 4.9 10-10)
B) HClO (Ka = 3.0 10-8)
C) HNO2 (Ka = 4.5 10-4)
D) HF (Ka = 6.8 10-4)