This question is about some chemistry of sulfur oxides and group 13/15 chlorides.
SO3 SO_3\,SO3 decomposes to form SO2 SO_2\,SO2 and O2O_2O2, as shown in Equilibrium 18.1.
SO3(g)⇌SO2(g)+12O2(g)ΔH=+99 kJ mol−1 SO_3(g) \rightleftharpoons SO_2(g) + \frac{1}{2}O_2(g) \quad \Delta H = +99 \text{ kJ mol}^{-1} SO3(g)⇌SO2(g)+21O2(g)ΔH=+99 kJ mol−12.50 moles2.50 \text{ moles}2.50 moles of SO3 SO_3\,SO3 is heated in a closed container in the presence of a catalyst and the resulting mixture is allowed to reach equilibrium. The equilibrium mixture contains 1.00 mol of SO2 SO_2\,SO2 and the total pressure of the system is 4.80 bar4.80 \text{ bar}4.80 bar.
Calculate the numerical value for Kp K_p\,Kp for Equilibrium 18.1 under these conditions and state the units of KpK_pKp. Give your answer to 3 significant figures.
Kp=K_p =Kp= ______________ units = ______________
The numerical values of Kp K_p\,Kp for Equilibrium 18.1 at temperatures T1 T_1\,T1 and T2 T_2\,T2 are shown below.
| Temperature | KpK_pKp |
|---|---|
| T1T_1T1 | 1.8 × 10-3 |
| T2T_2T2 | 3.5 × 10-1 |
Explain why T2 T_2\,T2 is a higher temperature than T1T_1T1.
Suggest how the value of Kp K_p\,Kp would change if the reaction was repeated with no catalyst added and the pressure of the system increased.
BCl3 BCl_3\,BCl3 and PCl3 PCl_3\,PCl3 both contain covalent bonds featuring chlorine.
Explain why the bond angles in BCl3 BCl_3\,BCl3 are 120∘120^\circ120∘.
Explain why both BCl3 BCl_3\,BCl3 and PCl3 PCl_3\,PCl3 have polar bonds, but only PCl3 PCl_3\,PCl3 has polar molecules.
