1 point Determine the value of the enthalpy change, Delta H vap, for the evaporation of one
mole of water using the information below.
H2O(l) → H2O(g)
CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(1)
CH4(g) + 2O2(g) → CO2(g) + 2 H2O(g)
Delta H= -890.5 kJ/mol
Delta H=-802.3 kJ/mol

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.