Consider the following intermediate chemical equations. CH.(g) → C(s)+2H (9)
CC1.(g) → C(s)+2Cl2(g)
H2(g)+C1, (g) → 2HCl(g)
AH, = 74.6 kJ
AH, = 95.7 kJ
AH, =-92.3kJ
What is the enthalpy of the overall chemical reaction CH,(g)+4C12(g) → CC1,(9)+4HCI(g)?
O-205.7 kJ
0-113.4 kJ
-14.3 kJ
0 78.0 kJ

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

Idon't know hope someone you