Problem

A sealed plastic syringe was connected to a pressure sensor and data logger. The following results were obtained at constant temperature.

Volume of air in gas syringe/ $\text{cm}^3$	Pressure/kPa
20	101.7
18	115.0
16	128.0
14	147.0
12	168.0
10	196.0
8	246.0

a. Plot pressure (y-axis) against volume (x-axis). b. Describe the relationship between the two variables and explain it using the kinetic molecular theory. c. Explain why the temperature needs to be kept constant.

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