Calculate the minimum volume of air used for complete combustion of a fuel having the composition by mass of 92% carbon, 4% hydrogen, 2% oxygen and 2% ash

A spherical container is used to store reacting chemicals, which results in a uniform heat flux (qi”) applied to the inner surface of the container. The initial temperature of the inner wall of the container, Ti, is 500K. The container has an inner radius of 0.4 m and an outer radius of 0.5 m, the density of the container’s walls are 8055 kg/m3, and its heat capacity is 535 J/(kg-K). The container is then suddenly submerged in a liquid bath with a temperature T∞=300K. The  convective heat transfer coefficient for the bath: h= 450 W/(m2 K).(a) Assume that there is a negligible thermal gradient in the wall of the container (dT/dr is negligible) and that the heat flux qi” is constant, write an equation that expresses how the temperature of the wall of the container changes with time (dT/dt) and evaluate the initial rate of change of wall temperature (dT/dt ) when qi”=106 W/m2.(b) What is the steady state temperature of the wall?

Accetylene gas (C2H2) is often used by plumbers,welders,and glass blowers because it burns in oxygen with an intensely hot flame.The products of the combination of accetylene are carbon dioxide and water vapour .Write the unbalanced chemical equation for this process.

Calculate the heat capacity for formaldehyde at 25°C. Answer should be in kJ/kgmol°C