Propane (C3H8) burns in excess oxygen (O2) according to the following reaction: C3H8 + 5O2 → 3CO2 + 4H2O How many moles of water (H2O) are formed from 1 mol of C3H8 being burned?

water is used to store them because it would keep the radiation from getting out in the open and causing harm to the workers

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.