3 (a.d.) Heat Moves One Direction
Heat Moves One Way: Heat transfer occurs in only one direction.
If two objects have different temperatures, heat will flow from the warmer object to the colder one. When heat flows into matter, the thermal energy of the matter increases. As the thermal energy increases, the temperature increases. At the same time, the temperature of the matter losing the heat decreases. Heat will flow from one object to the other until the two objects have the same temperature.
What happens when something becomes cold, such as when ice cream is made? In an ice cream maker, the ingredients are put into a metal can that is packed in ice. You might think that the ice transfers cold to the ingredients in the can. But this is not the case. There is no such thing as “coldness.” Instead, the ingredients grow colder as thermal energy flows from them to the ice. Heat transfer occurs in only one direction.
Can heat flow from one object to a warmer object? Why or why not?
If two objects have different temperatures, heat will flow from the warmer object to the colder one. When heat flows into matter, the thermal energy of the matter increases. As the thermal energy increases, the temperature increases. At the same time, the temperature of the matter losing the heat decreases. Heat will flow from one object to the other until the two objects have the same temperature.
What happens when something becomes cold, such as when ice cream is made? In an ice cream maker, the ingredients are put into a metal can that is packed in ice. You might think that the ice transfers cold to the ingredients in the can. But this is not the case. There is no such thing as “coldness.” Instead, the ingredients grow colder as thermal energy flows from them to the ice. Heat transfer occurs in only one direction.
Can heat flow from one object to a warmer object? Why or why not?