Question

A)
A test tube has a stopper on top. Is the system still be able to transmit heat? Why or why not?
(1 point)
Yes, it can transmit heat because the heat will escape through the glass and stopper.
Yes, it can transmit heat because the heat will escape when the stopper is eventually opened.
No, it cannot transmit heat because the heat cannot escape out of the opening.
No, it cannot transmit heat because the moving molecules are completely contained inside the test tube.
A)
Since energy is never created or destroyed, how does it flow in a system during a chemical reaction?
(1 point)
Reactants absorb energy that is then released by the products.
Reactants release energy that is then absorbed by the products.
It is released to the environment to break bonds, then absorbed from the surroundings when formingbonds.
It is absorbed from the environment to break bonds, then released back into the surroundings whenforming

Answer 1

1) Yes — "Yes, it can transmit heat because the heat will escape through the glass and stopper."
Explanation: The stopper prevents mass transfer but does not prevent heat transfer; heat can be conducted through the glass/stopper and exchanged by conduction and radiation.

2) "It is absorbed from the environment to break bonds, then released back into the surroundings when forming."
Explanation: Breaking chemical bonds requires input of energy (absorbed), while forming new bonds releases energy.