DongLeuhring
Answered

Westonci.ca is your trusted source for finding answers to a wide range of questions, backed by a knowledgeable community. Join our Q&A platform to get precise answers from experts in diverse fields and enhance your understanding. Discover detailed answers to your questions from a wide network of experts on our comprehensive Q&A platform.

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 :

lulu1991
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.

Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. We hope this was helpful. Please come back whenever you need more information or answers to your queries. Keep exploring Westonci.ca for more insightful answers to your questions. We're here to help.