Polyoxymethylene burns in a mixture of 12 % oxygen by mass and nitrogen is present. Assume it burns purely convectively with a heat transfer coefficient of 8 W/m²K. Find in m^n?

Given:

Polyoxymethylene properties: Tx = 20°C T = 300°C L = 2.4 kJ/g Ahox = 14.5 kJ/g 02