What would happen to the average kinetic energy of the molecules
of a gas sample if the
temperature of the sample increased from 20°C to 40°C?
A) It would become half its value.
B) It would double.
C) It would decrease.
D) It would increase.
E) Two of these.
we know that
average kinetic energy of a molecule at a temperature is given by
K.Eavg = 1.5 x k x T
here
k is the boltzmann constant
T is the temperature in kelvin scale
so
at two differenet temperatures we get
K.E2/ K.E1 = T2 / T1
given
T1 = 20 C
T1 = 20 + 273 K
T1 = 293 K
also
T2 = 40 C
T2 = 40 + 273
T2 = 313 K
so
using those values
we get
K.E2/ K.E1 = T2 / T1
K.E2/ K.E1 = 313/293
K.E2/ K.E1 = 1.068
so
the average kinetic energy increased by 1.068 times
so the answer is
option D) it would increase
What would happen to the average kinetic energy of the molecules of a gas sample if...
6. Use the kinetic molecular theory of gases to predict what would happen to a closed sample of a gas whose temperature increased while its volume decreased. A) Its pressure would decrease. B) Its pressure would increase. C) Its pressure would hold constant. D) The number of moles of the gas would decrease. E) The average kinetic energy of the molecules of the gas would decrease.
If the average kinetic energy of the molecules of a gas at 10 °C is E, find the temperature (in unit of °C) needed in order to increase the average kinetic energy to become 2E.
compression. D) isobaric compression. 5) The average molecular kinetic energy of a gas can be determined by knowing A) only the number of molecules in the gas. B) only the volume of the gas. C) only the pressure of the gas. D) only the temperature of the gas. E) All of the above quantities must be known to determine the average molecular kinetic energy sion. 10) When a fixed amount of ideal gas goes through an adiabatic expansion, A) its...
What is the temperature of a sample of gas when the average translational kinetic energy of a molecule in the sample is 8.93 × 10 − 21 J ? temperature: K What is the total translational kinetic energy of all the molecules of this sample, when it contains 1.61 moles of gas? total translational kinetic energy:
The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. But given the same kinetic energies, a lighter molecule will move faster than a heavier molecule.R=8.314 J/(mol·K) and ℳ is molar mass in kilograms per mole. Note that a joule is the same as a kg·m2/s2.What is the rms speed of Cl2 molecules at 415 K? What is the rms speed of He atoms at 415 K?
Determine the average value of the translational kinetic energy of the molecules of an ideal gas at (a) 29.4^degreeC and (b) 100^degreeC. What is the translational kinetic energy per mole of an ideal gas at (c) 29.4^degreeC and (d) 100^degreeC?
Consider a 1.0-L container of neon gas at STP. Will the average kinetic energy, average velocity, and frequency of collisions of gas molecules with the walls of the container increase, decrease, or remain the same under the following condition: The temperature is decreased to -50°C.
The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. However, given the same kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed 3 RT rms speed where R = 8.314 J/(mol-K) and Mis molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter squared per second squared (kg-mº/s2). What is the rms speed of F,...
The average kinetic energy of the molecules in a gas sample depends only on the temperature, 7. However, given the same kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed 3RT rms speed = where R = 8.314 J/mol K) and is molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter squared per second squared (kg-m/s). What is the rms speed of...
Internal Energy of a gas, ldeal Gas Law 1. The average kinetic energy of a molecule, is called thermal energy, it is directly related to absolute temperature. 1 3 KE (average per molecule) mv(average) =kT (kg =1.38x10-23 J/K) 3KBT 2. The average speed of molecules in a gas: vrms+ т where vrms stands for root-mean-square (rms) speed. 3. The INTERNAL ENERGY of a gas is the TOTAL ENERGY of ALL the N atoms and molecules For a MONATOMIC gas, each...