The catalytic converter in cars converts nitrogen dioxide, an air pollutant, into harmless nitrogen gas and oxygen gas. If the engine is releasing about 20.0L of nitrogen dioxide over an hour, how many moles of nitrogen gas is coming out of the exhaust?

Equation:

I am converting from: to

Conversion Factor:

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.