Given the following enthalpy changes, Iz(g) + 3Cl2(g) → 21013(s); AH = -214 k mol-1
Iz(s) - 13(g); AH = +38 kJ mol-1
What is the standard enthalpy change of
formation of iodine trichloride, IC13(s)?

A. +176 kJ mol-1
B.-214 kJ mol-1
C.-176 kJ mol-1
D.-88 kJ mol-1​

d.) circle motion requires a force to give it a centripetal acceleration.

1. they vary with a higher number because boiling is way hotter than melting

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.