Final answer:
When the air temperature rises, the pressure inside the butane cylinder increases due to gas expansion. A large fall in temperature outside the caravan will decrease the pressure inside the cylinder and potentially affect the size of the cooking flame.
Step-by-step explanation:
When the air temperature rises in summer, the pressure inside the butane cylinder will increase. This is because gases expand when heated. As the temperature increases, the gas molecules inside the cylinder gain more kinetic energy and move faster, colliding with the walls of the cylinder more frequently and with greater force. This increased frequency and force of collisions lead to an increase in pressure inside the cylinder.
If there is a large fall in the air temperature outside the caravan, it will have an effect on the size of the cooking flame. When the air temperature decreases, the pressure inside the butane cylinder will decrease. As the gas cools, the gas molecules lose kinetic energy and move slower, resulting in fewer and weaker collisions with the walls of the cylinder. This decrease in collision frequency and force leads to a decrease in pressure inside the cylinder. As a result, the cooking flame may become smaller and less intense.