Question

9.Enter your answer in the provided box.

S(rhombic) + O2(g) → SO2(g)                      ΔHo rxn= −296.06 kJ/mol

S(monoclinic) + O2(g) → SO2(g)                 ΔHo rxn= −296.36 kJ/mol

calculate the enthalpy change for the transformation

S(rhombic) → S(monoclinic)

(Monoclinic and rhombic are different allotropic forms of elemental sulfur.)

_______kJ/mol

10. Enter your answer in the provided box

Use the following data to calculate ΔHo/f for CS2(l):

C(graphite) + O2(g) → CO2(g)                      ΔHo rxn= −393.5 kJ/mol

S(rhombic) + O2(g) → SO2(g)      ΔHo rxn= −296.4 kJ/mol

CS2(l) + 3O2(g) → CO2(g) + 2SO2(g)         ΔHo rxn= −1073.6 kJ/mol

ΔHo/f=__________ kJ/mol

1.

Be sure to answer all parts.

(a) Calculate the energy in joules of a 5.41 g object moving at a speed of 727 m/s.

Ek =______ J

(b) Determine how much greater the electrostatic energy is between charges of +2 and −2 than it is between charges of +1 and −1 (assume that the distance between the charges is the same in each case).

__1.5 times

__ 2.0 times

__ 2.5 times

__ 3.0 times

__3.5 times

__4.0 times

__4.5 times

___5.0 times

Answer 1