Free Response Question - PLEASE HEL 5880 grams of paraffin wax, C25H52 are burned in excess oxygen at 520 C in a rigid 150 Liter container according to the following equation:
C25H52 + O2(g) --> CO2(g) + H2O(g)

a) Balance the equation
b) Calculate the pressure of carbon dioxide gas when the reaction goes to completion
c) Calculate the pressure of water vapor when the reaction goes to completion
d) If there are 18.55 moles of oxygen gas leftover in the container along with the carbon dioxide and water vapor when the reaction goes to completion, what is the total pressure of the system?
e) The rigid container is opened, explain which gas is going to effuse faster, water vapor or oxygen gas? Prove mathematically how much faster.

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1 is the answer to this problem

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.