A solid object heated to 120°C is placed inside a container of water at 33°C. A thermometer is placed inside the container and a measurement of the temperature is taken every few seconds. Which graph BEST represents the change in water temperature after the solid object is added?
Since the object that was added into the water was hot, the water's temperature will increase. The increase of temperature with time will follow a curve increasing from 33°C towards the equilibrium temperature. The curve will plateau when it reaches the equilibrium temperature.