DongLeuhringidn
Answered

Dive into the world of knowledge and get your queries resolved at IDNLearn.com. Our community is here to provide the comprehensive and accurate answers you need to make informed decisions.

In which sample is the average kinetic energy of the particles greatest?
(1) 10. mL of HCl(aq) at 25°C
(2) 15 mL of HCl(aq) at 20.°C
(3) 10. mL of H2O(l) at 35°C
(4) 15 mL of H2O(l) at 30.°C

Sagot :

Lulu1991idn
The question asks about the average kinetic energy, so it is related only to temperature. Then the answer is (3) with the highest temperature.

Answer: The correct answer is option 3.

Explanation: Average kinetic energy is defined as the energy of motion of the particles of a system. It is a measure of Kelvin Temperature.

Mathematically,

[tex]K=\frac{3}{2}\frac{R}{N_A}T[/tex]

where,

K = kinetic energy of the molecules measured in joules.

R = Gas constant = [tex]8.314Jmol^{-1}K^{-1}[/tex]

[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}atoms/mol[/tex]

T = Temperature in kelvins.

Kinetic energy is directly proportional to the temperature of the system.

[tex]\text{Kinetic energy}\propto \text{Temperature}[/tex]

More the temperature, more will be the kinetic energy of the molecules.

Hence, the correct answer is Option 3.

We appreciate your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. Discover insightful answers at IDNLearn.com. We appreciate your visit and look forward to assisting you again.