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cathode-ray
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Homework Statement
Consider a fridge with a volume of 120L whose door has 0.8m of height and 0.5m of length. When the door is open there isn't a relevant change in the air quantity inside the fridge. However the temperature increases slightly.
Suppose that when the door is opened, the air inside the fridge reaches an uniform temperature of -8 ºC, and is in equilibrium with the outside atmosferic pressure. When the door is closed, the air inside the fridge cools down until it reaches a temperature of -10 ºC. The air inside the fridge is considered an ideal gas and the door of the fridge is completely hermetic.
Homework Equations
Calculate the force needed to reopen the door.
The Attempt at a Solution
I don't know how to approach this problem