Question

A reaction is occurring in a test tube. How is heat transmitted to the surroundings?

(A) Heat is carried out with matter as matter is changed with the surroundings.
(B)As bubbles are formed and gas escapes, the heat is carried with the rising bubbles.
(C) All of the heat escapes out of the open top of the test tube as molecules collide with the air
(D) Molecules collide with the glass, and the glass molecules then transmit that energy to the outside.

Answer 1

In a chemical reaction taking place in a test tube, heat is transmitted to the surroundings through conduction, as molecules from the system collide with the test tube walls, transferring energy.

Step-by-step explanation:

When a chemical reaction occurs in a test tube, heat is transmitted to the surroundings primarily through the process of conduction. In this context, the correct choice is (D) Molecules collide with the glass, and the glass molecules then transmit that energy to the outside. The heat is transferred from the system (the mixture undergoing the reaction) to the surroundings (the test tube and the air around it) through the energetic collisions of molecules with the walls of the test tube. As the molecules of the system gain energy from the reaction, they move more vigorously and collide with the glass walls of the test tube. These collisions transfer energy to the glass molecules, which, in turn, conduct the heat away to the outer environment.

Answer 2

Step-by-step explanation:

1)inside the fume hood

2)an erupting volcano

3)many molecular collisions occurring quickly

4)Molecules collide with the glass, and the glass molecules then transmit that energy to the outside.

5)Heat and matter can both transfer between the system and the surroundings.