Passage IV

When substances are heated, they typically expand (increase in volume). Under certain circumstances, some substances will contract (decrease in volume) when heated. Table 1 shows the change in volume that occurred when 1.0000 L samples of solids at different initial temperatures were heated. Tables 2 and 3 show the results for similar trials using 1.0000 L samples of liquids and gases, respectively.

(Note: No phase changes occurred in any of the trials, and the gas samples were heated at constant pressure.)

22. Which of the following is a plausible explanation for the change in volume observed for the lead samples listed in Table 1 ? As the lead samples were heated, the lead atoms in the sample moved:

Answer and Explanation

Your Answer is

Correct Answer is H

Explanation

General knowledge questions.

First of all, it can be seen from table 1 that the volume of lead must increase after heating, so G and J are excluded;

Secondly, the higher the temperature, the more active the molecular movement, The bigger the gap between each other, so it is farther apart, choose H