A thick wood slab (k = 0.17 W/mK and = 1.28 10 -7 m 2

A thick wood slab (k = 0.17 W/m·K and α = 1.28 × 10^-7 m²/s) that is initially at a uniform temperature of 25°C is exposed to hot gases at 550°C for a period of 5 min. The heat transfer coefficient between the gases and the wood slab is 35 W/m²·K. If the ignition temperature of the wood is 450°C, determine if the wood will ignite.