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The density of water is 1000 kg `m^(–3)`. The density of water vapour at 100 °C and 1 atm pressure is 0.6 kg `m^(–3)`. The volume of a molecule multiplied by the total number gives ,what is called, molecular volume. Estimate the ratio (or fraction) of the molecular volume

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The density of water is 1000 kg `m^(–3)`. The density of water vapour at 100 °C and 1 atm pressure is 0.6 kg `m^(–3)`. The volume of a molecule multiplied by the total number gives ,what is called, molecular volume. Estimate the volume of a water

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The density of water is 1000 kg `m^(–3)`. The density of water vapour at 100 °C and 1 atm pressure is 0.6 kg `m^(–3)`. The volume of a molecule multiplied by the total number gives ,what is called, molecular volume. What is the average distance between atoms (interatomic distance)

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A vessel contains two nonreactive gases : neon (monotonic) and oxygen (diatomic). The ratio of their partial pressures is 3:2. Estimate the ratio of (i) number of molecules and (ii) mass density of neon and oxygen in the vessel. Atomic mass of Ne = 20.2 u, molecular mass of `O_2`= 32.0 u. Example

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A flask contains argon and chlorine in the ratio of 2:1 by mass. The temperature of the mixture is 27 °C. Obtain the ratio of (i) average kinetic energy per molecule, and (ii) root mean square speed vrms of the molecules of the two gases. Atomic mass of argon = 39.9 u; Molecular mass of chlorine = 70.9 u. Example

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Uranium has two isotopes of masses 235 and 238 units. If both are present in Uranium hexafluoride gas which would have the larger average speed ? If atomic mass of fluorine is 19 units, estimate the percentage difference in speeds at any temperature.Example

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Answer of the following. When a molecule (or an elastic ball) hits a ( massive) wall, it rebounds with the same speed. When a ball hits a massive bat held firmly, the same thing happens. However, when the bat is moving towards the ball, the ball rebounds with a

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Answer of the following. When gas in a cylinder is compressed by pushing in a piston, its temperature rises. Guess at an explanation of this in terms of kinetic theory using (a)

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Answer of the following. What happens when a compressed gas pushes a piston out and expands. What would you observe

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Answer of the following. SachinTendulkar used a heavy cricket bat while playing. Did it help him in anyway ? Example

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A cylinder of fixed capacity 44.8 litres contains helium gas at standard temperature and pressure. What is the amount of heat needed to raise the temperature of the gas in the cylinder by 15.0 °C ? (R = 8.31 J `mol^(–1) K^(–1)`).Example

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Estimate the mean free path for a water molecule in water vapour at 373 K. Use information from Exercises 13.1 and Eq. (13.41) above.Example

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Estimate the fraction of molecular volume to the actual volume occupied by oxygen gas at STP. Take the diameter of an oxygen molecule to be 3

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Molar volume is the volume occupied by 1 mol of any (ideal) gas at standard temperature and pressure (STP : 1 atmospheric pressure, 0 °C). Show that it is 22.4

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Figure shows plot of PV/T versus P for `1.00×10^(–3)` kg of oxygen gas at two different temperatures. (a) What does the dotted plot signify? (b) Which is true: T1 > T2 or T1< T2 ? (c) What is the value of PV/T where the curves meet on the y-axis? (d) If we obtained similar plots for 1.00×10–3 kg of hydrogen, would we get the same value of PV/T at the point where the curves meet on the y-axis? If not, what mass of hydrogen yields the same value of PV/T (for low pressure high temperature region of the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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An oxygen cylinder of volume 30 litres has an initial gauge pressure of 15 atm and a temperature of 27 °C. After some oxygen is withdrawn from the cylinder, the gauge pressure drops to 11 atm and its temperature drops to 17 °C. Estimate the mass of oxygen taken out of the cylinder (R = 8.31 J `mol^(–1) K^(–1)`, molecular mass of O2 = 32

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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An air bubble of volume 1.0 `cm^3` rises from the bottom of a lake 40 m deep at a temperature of 12 °C. To what volume does it grow when it reaches the surface, which is at a temperature of 35 °C

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Estimate the total number of air molecules (inclusive of oxygen, nitrogen, water vapour and other constituents) in a room of capacity 25.0 `m^3` at a temperature of 27 °C and 1 atm

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Estimate the average thermal energy of a helium atom at (i) room temperature (27 °C), (ii) the temperature on the surface of the Sun (6000 K), (iii) the temperature of 10 million kelvin (the typical core temperature in the case of a

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Three vessels of equal capacity have gases at the same temperature and pressure. The first vessel contains neon (monatomic), the second contains chlorine (diatomic), and the third contains uranium hexafluoride (polyatomic). Do the vessels contain equal number of respective molecules ? Is the root mean square speed of molecules the same in the three cases? If not, in which case is vrms the largest

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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