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Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following : What is the change in

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

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Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following : Do the intermediate states of

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

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A steam engine delivers `5.4×10^8`J of work per minute and services `3.6 × 10^9`J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per

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

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An electric heater supplies heat to a system at a rate of 100W. If system performs work at a rate of 75 joules per second. At what rate is the internal energy

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

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A thermodynamic system is taken from an original state to an intermediate state by the linear process shown in Fig. ) Its volume is then reduced to the original value from E to F by an isobaric process. Calculate the total work done by the gas from D to E to

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

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A refrigerator is to maintain eatables kept inside at 90C. If room temperature is 360C, calculate the coefficient of

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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

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

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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

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

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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

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

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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

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

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