The reaction 2no2 → 2no + o2 obeys the rate law: rate = 1.4 x 10-2[no2]2 at 500 k . what would be the rate constant at 191 k if the activation energy is 80. kj/mol? this is a second order reaction, giving k the units of m-1s-1 this will not change with the change in temperature. do not include units in your answer. exponential numbers need to be entered like this: 2 e-1 means 2 x 10-1.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock

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.