Problem 3) A full propane cylinder from a camp stove leaks its contents of 1.02lb (0.464 kg) into a 12 x 14x 8 (3.66 m x 4.27 m x 2.44 m) room at 20 C and 1 atm. After a long time, the fuel gas androom air are well mixed. Is the mixture in the room flammable?

Problem 4) Consider the outward propagation of a spherical laminar flame into an infinite medium ofunburned gas. Assuming that burning velocity is a constant, determine an expression for theradial velocity of the flame front for a fixed coordinate system with its origin at the center of thesphere. Obtain the radial velocity of a flame of mixtures of stoichiometric Methane air, Propaneair, Butane-air, Hydrogen air, and Methane-oxygen. Explain (in words) if the radial velocitywill remain constant as the flame propagates outwards. What will happen and why?

Problem 5) A detonation wave travels in a H2 - 02 mixture having a molar oxidizer to fuel ratio of 3.0Estimate the detonation velocity for an initial state of P1 = 1atm and T1 = 291 K. You can assumeT2 = 2500 K.