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Cake day: June 20th, 2023

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  • The contents of the oven have a certain heat capacity, which means you need a certain amount of energy to raise their temperature a certain amount.

    If your pan has a higher heat capacity than the air it replaces, putting the pan in would increase the total heat capacity in your oven. That means more energy is needed to heat it up.

    Now your oven dumps heat energy into it’s contents at a certain rate. This rate will not be affected by the pan, it only depends on a) the rate at which the heating elements release heat energy and b) the rate at which heat escapes the oven.

    So adding the pan means more energy is needed to reach the same temperature, but the oven still supplies energy at the same rate, so it takes longer.