For the reaction of hydrogen gas with iodine gas to make hydrogen iodide gas, H2+I2→2HI, you have the following concentrations at equilibrium: [H2]=4.5647×10^−3 M, [I2]=7.378×10^−4 M, and [HI]=1.3544×10^−2 M. What is the equilibrium constant?

0.4997

0.54

46.33

54.47

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.

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