It is tempting on a hot summers day to open the fridge up to cool down the room. However, this actually increases the temperature in the room estimate how much the room is heated up. list the assumptions you are making (e.g. steady-state, constant density, viscosity) and justify them. Also, if you did heat transfer then discuss how you would solve a similar problem using mass transfer and visa-versa (you dont have to resolve the problem just explain how you would do it and write down the key equations you would use).