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AssignmentMultiple Select

Solids and Plasmas

Question 1 • FL-2003350-Chemistry 1 Honors Sem 1 - Flex

Which of these statements are consistent with kinetic-molecular theory? Select all that apply.

Answer
A
The molecules in water at 100°C have more kinetic energy than the molecules in water at 0°C.
B
As a solid is heated, its particles absorb thermal energy and move more slowly.
C
The carbon atoms in a diamond vibrate back and forth in place.
D
The particles of matter in the sun are in constant random motion.
E
If you superheat a gas, its particles eventually stop moving completely.

Explanation

Kinetic-molecular theory says that particles are in constant motion, and their average kinetic energy increases with temperature. Thus, water molecules at 100°C have more average kinetic energy than at 0°C (A), and carbon atoms in solid diamond vibrate in place (C). The particles in the sun are also in constant random motion (D). Heating does not make particles move more slowly or stop completely, so B and E are inconsistent.

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