Question

In caravans, butane is used for cooking. The gas is stored in cylinders under pressure. The gas in the cylinder is mostly a liquid but some of it is gas.

1.The gas molecules exert a pressure on the inside of the cylinder. How do they do this?

2.Butane cylinders are kept outside the caravan. When the air temperature rises in the summer, what will happen to the pressure inside the cylinder and why will it change?

3.If there was a large fall in the air temperature outside the caravan, what effect would this have on the size of the cooking flame?

Answer 1

1) The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces. The more particles that hit the walls, the higher the pressure .