Question

Which of the following list only isolated systems?1.Coffee in a styrofoam cup with the lid closed, a soda bottle in the cooler at the store. 2.The soda you have poured into a styrofoam cup, coffee in a styrofoam cup with the lid closed. 3.A soda in a styrofoam cup with a lid, coffee in a thermos with the lid closed. 4.The soda you have poured into a styrofoam cup, coffee in a coffee cup.

Answer 1

A soda in a styrofoam cup with a lid, coffee in a thermos with the lid closed is the isolated systems.

Explanation:

Styrofoam cups and thermos containers are typical examples of containers that don’t allow the transfer of heat energy in their environments. A system is said to be isolated if it doesn’t allow heat exchange with its surroundings. A Styrofoam cup with a lid keeps the coffee hot due to its insulation properties.

Thermos container is a more effective insulator since it is made of double-walled container to lock either heat or cold inside. Insulators create effective isolated system depending on the materials they were made from. A completely isolated system does exist.