Gas is trapped in a syringe by a piston. Fig. 5.1 shows that the narrow end of the syringe is sealed. [Figure 5.1] When the gas is at a pressure of 1.1 × 10⁵ Pa, it occupies a volume of 40 cm³.

1. (a)Explain, in terms of the molecules, how the gas exerts a pressure on the inside of the syringe. ............................................................................................................................................... ............................................................................................................................................... ............................................................................................................................................... ...............................................................................................................................................[3][3]
2. (b)The piston is slowly pulled to the right until the volume occupied by the gas is 110cm³. The temperature of the gas does not change. Calculate the new pressure of the gas. pressure = ..............................................................[2][2]

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