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Molecular Physics | Thermodynamics
What quantity is carried by sound waves from their source to the point where they eventually get absorbed?
Molecular Physics | Thermodynamics
A mass of ideal gas of volume 400 cm3 at a temperature of 27 ˚C expands adiabatically until its volume is 500 cm3. Calculate the new temperature. The gas is then compressed isothermally until its pressure returns to the original value. Calculate the final volume of the gas. Assume γ = 1.40.
Molecular Physics | Thermodynamics
A water vapour thermometer is calibrated at the ice and steam points and the saturation
vapour pressures (s.v.p) are measured. The saturation vapour pressure Pθ is given by
Pθ =P0(1+αθ+βθ^2) , where P0 is the s.v.p at the ice point, θ is the temperature in ˚C on
the Celsius scale, α and β are constants and α = 40 β ˚C. Determine the temperature of a
medium on the water vapour scale if its temperature on the Celsius scale is 50 ˚C.
vapour pressures (s.v.p) are measured. The saturation vapour pressure Pθ is given by
Pθ =P0(1+αθ+βθ^2) , where P0 is the s.v.p at the ice point, θ is the temperature in ˚C on
the Celsius scale, α and β are constants and α = 40 β ˚C. Determine the temperature of a
medium on the water vapour scale if its temperature on the Celsius scale is 50 ˚C.
Molecular Physics | Thermodynamics
The density of a gas of relative molecular mass 28 at a certain temperature is 0.90 kgm-3.
The root mean square speed of the gas molecules at that temperature is 602 ms-1. Assuming that the rate of diffusion of a gas is inversely proportional to the square root of its density, calculate the density of the gas standard temperature and pressure if its root mean square speed at is 490 ms-1.
Molecular Physics | Thermodynamics
Under what condition (if any) does a moving body experience no energy even though there
is a net force acting on it?
is a net force acting on it?
Molecular Physics | Thermodynamics
Give the thermometric properties of the following:
a. Mercury -in-glass thermometer
b. Resistance thermometer
c. Constant volume gas thermometer
d. Pyrometer
a. Mercury -in-glass thermometer
b. Resistance thermometer
c. Constant volume gas thermometer
d. Pyrometer
Molecular Physics | Thermodynamics
why an ice cube at 0 ˚C is more effective in cooling a drink than
the same mass of water also at 0 ˚C
the same mass of water also at 0 ˚C
Molecular Physics | Thermodynamics
A 90 ˚C liquid of mass 1 kg and specific heat capacity 4.5 x 103
J/kg K is poured into a
brass calorimeter of mass 150 g containing an unknown liquid of mass 20 g at a temperature
of 25 ˚C. If the final temperature of the mixture is 70 ˚C, determine the specific heat
capacity of the unknown liquid. The s.h.c of brass is 380 J/kg K.
J/kg K is poured into a
brass calorimeter of mass 150 g containing an unknown liquid of mass 20 g at a temperature
of 25 ˚C. If the final temperature of the mixture is 70 ˚C, determine the specific heat
capacity of the unknown liquid. The s.h.c of brass is 380 J/kg K.
Molecular Physics | Thermodynamics
The density of a gas of relative molecular mass 28 at a certain temperature is 0.90 kgm-3
.
The root mean square speed of the gas molecules at that temperature is 602 ms-1
. Assuming that the rate of a gas is inversely proportional to the square root of it's density calculate the density of the gas standard temperature and pressure of it's root mean square speed is 490m/s.
.
The root mean square speed of the gas molecules at that temperature is 602 ms-1
. Assuming that the rate of a gas is inversely proportional to the square root of it's density calculate the density of the gas standard temperature and pressure of it's root mean square speed is 490m/s.
Molecular Physics | Thermodynamics
A can of drinking chocolate contains a chemical heating pack that releases 3.5 x 104
J of
energy into drink when activated. Calculate the final temperature of the drink assuming no
energy is lost to the can or surroundings. [Mass of drink = 0.21 kg, specific heat capacity
of drink = 4200 J kg-1 K
-1
, initial temperature of drink = 20 °C]
J of
energy into drink when activated. Calculate the final temperature of the drink assuming no
energy is lost to the can or surroundings. [Mass of drink = 0.21 kg, specific heat capacity
of drink = 4200 J kg-1 K
-1
, initial temperature of drink = 20 °C]
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#340153 on Dec 2023
#340153 on Dec 2023