Advertisements
Advertisements
प्रश्न
Compute the temperature at which the r.m.s. speed of nitrogen molecules is 832 m/s. [Universal gas constant, R = 8320 J/k mole K, molecular weight of nitrogen = 28.]
Advertisements
उत्तर
Given:-
crms = 832 m/s,
R = 8320 J/k mole K,
M = 28
To find:
R.M.S velocity (crms)
Formula:-
`"c"_(rms)=sqrt((3RT)/M)`
Calculation: From formula,
`832=sqrt((3xx8320xxT)/28)`
`thereforeT=(832xx832xx28)/(3xx8320)`
`T=(832xx28)/30`
`T=776.5 K`
∴ T = 776.5 K or 503.5° C
The r.m.s. speed of nitrogen molecules is 832 m/s at 776.5 K or 503.5° C
APPEARS IN
संबंधित प्रश्न
The substance which allows heat radiations to pass through is _______.
(A) iron
(B) water vapour
(C) wood
(D) dry air
A body cools from 80° C to 70° C in 5 minutes and to 62° C in the next 5 minutes. Calculate the temperature of the surroundings.
Can the bulb of a thermometer be made of an adiabatic wall?
Why do marine animals live deep inside a lake when the surface of the lake freezes?
If the temperature of a uniform rod is slightly increased by ∆t, its moment of inertia I about a line parallel to itself will increase by
In a calorimeter, the heat given by the hot object is assumed to be equal to the heat taken by the cold object. Does it mean that heat of the two objects taken together remains constant?
A body A is placed on a railway platform and an identical body B in a moving train. Which of the following energies of B are greater than those of A, as seen from the ground?
(a) Kinetic
(b) Total
(c) Mechanical
(d) Internal
When a solid melts or a liquid boils, the temperature does not increase even when heat is supplied. Where does the energy go?
The atmospheric temperature in the cities on sea-coast change very little. Explain
Two bodies at different temperatures are mixed in a calorimeter. Which of the following quantities remains conserved?
The mechanical equivalent of heat ____________ .
The temperature of an object is observed to rise in a period. In this period
(a) heat is certainly supplied to it
(b) heat is certainly not supplied to it
(c) heat may have been supplied to it
(d) work may have been done on it
A metre scale made of steel is calibrated at 20°C to give correct reading. Find the distance between the 50 cm mark and the 51 cm mark if the scale is used at 10°C. Coefficient of linear expansion of steel is 1.1 × 10–5 °C–1.
A pendulum clock shows correct time at 20°C at a place where g = 9.800 m s–2. The pendulum consists of a light steel rod connected to a heavy ball. It is taken to a different place where g = 9.788 m s–1. At what temperature will the clock show correct time? Coefficient of linear expansion of steel = 12 × 10–6 °C–1.
The volume of a glass vessel is 1000 cc at 20°C. What volume of mercury should be poured into it at this temperature so that the volume of the remaining space does not change with temperature? Coefficients of cubical expansion of mercury and glass are 1.8 × 10–6 °C–1 and 9.0 × 10–6 °C–1 , respectively.
Answer the following question.
Clearly, state the difference between heat and temperature?
Explain the meaning of heat and work with suitable examples.
Our normal body temperature is ______.
Two objects are said to be in thermal contact if they can exchange heat energy.
Temperature in the form of energy.
Give reasons for the following:
Hot metal ball of 80° C is dipped into water of 80°C. The ball will not contract.
What is the SI unit of heat?
The average kinetic energy of molecules of a gas is directly related to which physical quantity?
When two bodies at different temperatures are placed in contact, heat flows from ______.
Which of the following correctly differentiates heat from temperature?
The concept of thermal equilibrium, where heat flows between bodies until they reach the same temperature, is the basis of which law of thermodynamics?
