Question

In which of these samples do the molecules most likely have the most kinetic energy? solid ice at −5°C ice water at 0°C liquid water at 98°C water vapor at 150°C

Answer 1

Water vapour at
`150^(0)C`

Step-by-step explanation:

First, three states of matter are given in the stated question, they are;

1) Solid (molecules are tightly packed and movement (KE) is restricted)

2) Liquid (molecules are close together and capable of motion (little KE))

3) Gas (molecules are loosely packed and capable of fast motion (high KE))

However, according to molecular motion, which is defined as the movement of constituent particles or molecules in a certain direction.

The movement of constituent particles or molecules is affected by two major factors, heat and temperature. Temperature is the measure of average kinetic energy of molecules.

This means that the higher the temperature of a body, the higher the kinetic energy of its constituent molecules.

a) Solid ice at -
`5^(0)C` has low kinetic energy because the temperature is low and also, in a solid particle, motion is restricted.

b) Ice water at
`0^(0)C` has low kinetic energy due to low temperature and also, the molecules are being solidified and motion is gradually restricted

c) Liquid water at
`98^(0)C` has high kinetic energy because the temperature is high and in liquid state, molecules are capable of motion

d) Water vapor at
`150^(0)C` has the most kinetic energy because it has the highest temperature and also, molecules in gaseous state are capable of fast motion.

Answer 2

From the samples, the molecule that most likely have the most kinetic energy is :
Water Vaport at 150 C
(usually , water will vapor only at 100 C)

hope this helps