compare the type of change that occurs when a match is burnt and when a liquid starts boiling. use complete sentences to justify the type of change that occurs.

When a match is burnt, it goes through a chemical change. The substances that make up the matched is changed chemically as the fire burns the match and changes its original chemical composition. When liquid starts boiling, it goes through a physical change.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.