A sealed cylinder fitted with a movable piston contains ideal gas at 27°C,pressure 0.500 × 105 Pa,and volume 1.25 m3.What will be the final temperature if the gas is compressed to 0.800 m3 and the pressure rises to 0.820 × 105 Pa?

A) 42°C B) 68°C C) 130°C D) 250°C E) 150°C A) 42°C B) 68°C C) 130°C D) 250°C E) 150°C

Exam 17: Phases and Phase Changes

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Consider two equal-volume flasks of gas at the same temperature and pressure.One gas,oxygen,has a molecular mass of 32.The other gas,nitrogen,has a molecular mass of 28.What is the ratio of the number of oxygen molecules to the number of nitrogen molecules in these flasks?

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Question 81

The rms speed of a certain sample of carbon dioxide molecules,with a molecular weight of 44.0 g/mole,is 396 m/s.What is the rms speed of water vapor molecules,with a molecular weight of 18.0 g/mol,at the same temperature as the carbon dioxide?

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Question 82

The absolute temperature of a gas is T.In order to double the rms speed of its molecules,what should be the new absolute temperature?

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Question 83

At what temperature is the rms speed of hydrogen molecules,H₂,which have a molecular weight of 2.02 g/mole,equal to 2.0 km/s? The Boltzmann constant is 1.38 × 10^-23 J/K and N_A = 6.022 × 10²³ molecules/mol.

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Question 84

A sealed cylinder fitted with a movable piston contains ideal gas at 27°C,pressure 0.500 × 10⁵ Pa,and volume 1.25 m³.What will be the final temperature if the gas is compressed to 0.800 m³ and the pressure rises to 0.820 × 10⁵ Pa?

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Question 85

Two containers of equal volume each hold samples of the same ideal gas.Container A has twice as many molecules as container B.If the gas pressure is the same in the two containers,the correct statement regarding the absolute temperatures T_A and T_B in containers A and B,respectively,is

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Question 86

A brass wire 2.0 m long and 2.0 mm in diameter supports a 10.0-kg fixture.By what distance did this fixture stretch the wire? Young's modulus for brass is 10 × 10¹⁰ N/m².

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Question 87

A sealed container holds 0.020 moles of ideal nitrogen (N₂)gas,at a pressure of 1.5 atm and a temperature of 290 K.The atomic mass of nitrogen is 14.0 g/mol.How many molecules of nitrogen are in the container? (R = 8.31 J/mol ∙ K,1 atm = 101 kPa)

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Question 88

Oxygen molecules are 16 times more massive than hydrogen molecules.At a given temperature,the average molecular kinetic energy of oxygen molecules,compared to that of hydrogen molecules,

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Question 89

A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules are at STP.Which statements are true about these molecules? (There could be more than one correct choice. )

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Question 90

On a cold day,you take in 4.2 L of air into your lungs at a temperature of 0°C.If you hold your breath until the temperature of the air in your lungs reaches 37°C,what is the volume of the air in your lungs at that point,assuming the pressure does not change?

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Question 91

A 50-kg load is suspended from a steel wire of diameter 1.0 mm and length 11.2 m.By what distance will the wire stretch? Young's modulus for steel is 2.0 × 10¹¹ Pa.

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Question 92

The figure shows a graph of the temperature of a pure substance as a function of time as heat is added to it at a constant rate in a closed container.If L_F is the latent heat of fusion of this substance and L_V is its latent heat of vaporization,what is the value of the ratio L_V/L_F?

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Question 93

Showing 81 - 93 of 93

Exam 17: Phases and Phase Changes

Consider two equal-volume flasks of gas at the same temperature and pressure.One gas,oxygen,has a molecular mass of 32.The other gas,nitrogen,has a molecular mass of 28.What is the ratio of the number of oxygen molecules to the number of nitrogen molecules in these flasks?

The rms speed of a certain sample of carbon dioxide molecules,with a molecular weight of 44.0 g/mole,is 396 m/s.What is the rms speed of water vapor molecules,with a molecular weight of 18.0 g/mol,at the same temperature as the carbon dioxide?

The absolute temperature of a gas is T.In order to double the rms speed of its molecules,what should be the new absolute temperature?

At what temperature is the rms speed of hydrogen molecules,H2,which have a molecular weight of 2.02 g/mole,equal to 2.0 km/s? The Boltzmann constant is 1.38 × 10-23 J/K and NA = 6.022 × 1023 molecules/mol.

A sealed cylinder fitted with a movable piston contains ideal gas at 27°C,pressure 0.500 × 105 Pa,and volume 1.25 m3.What will be the final temperature if the gas is compressed to 0.800 m3 and the pressure rises to 0.820 × 105 Pa?

Two containers of equal volume each hold samples of the same ideal gas.Container A has twice as many molecules as container B.If the gas pressure is the same in the two containers,the correct statement regarding the absolute temperatures TA and TB in containers A and B,respectively,is

A brass wire 2.0 m long and 2.0 mm in diameter supports a 10.0-kg fixture.By what distance did this fixture stretch the wire? Young's modulus for brass is 10 × 1010 N/m2.

A sealed container holds 0.020 moles of ideal nitrogen (N2)gas,at a pressure of 1.5 atm and a temperature of 290 K.The atomic mass of nitrogen is 14.0 g/mol.How many molecules of nitrogen are in the container? (R = 8.31 J/mol ∙ K,1 atm = 101 kPa)

Oxygen molecules are 16 times more massive than hydrogen molecules.At a given temperature,the average molecular kinetic energy of oxygen molecules,compared to that of hydrogen molecules,

A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules are at STP.Which statements are true about these molecules? (There could be more than one correct choice. )

On a cold day,you take in 4.2 L of air into your lungs at a temperature of 0°C.If you hold your breath until the temperature of the air in your lungs reaches 37°C,what is the volume of the air in your lungs at that point,assuming the pressure does not change?

A 50-kg load is suspended from a steel wire of diameter 1.0 mm and length 11.2 m.By what distance will the wire stretch? Young's modulus for steel is 2.0 × 1011 Pa.

The figure shows a graph of the temperature of a pure substance as a function of time as heat is added to it at a constant rate in a closed container.If LF is the latent heat of fusion of this substance and LV is its latent heat of vaporization,what is the value of the ratio LV/LF?

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At what temperature is the rms speed of hydrogen molecules,H₂,which have a molecular weight of 2.02 g/mole,equal to 2.0 km/s? The Boltzmann constant is 1.38 × 10^-23 J/K and N_A = 6.022 × 10²³ molecules/mol.

A sealed cylinder fitted with a movable piston contains ideal gas at 27°C,pressure 0.500 × 10⁵ Pa,and volume 1.25 m³.What will be the final temperature if the gas is compressed to 0.800 m³ and the pressure rises to 0.820 × 10⁵ Pa?

Two containers of equal volume each hold samples of the same ideal gas.Container A has twice as many molecules as container B.If the gas pressure is the same in the two containers,the correct statement regarding the absolute temperatures T_A and T_B in containers A and B,respectively,is

A brass wire 2.0 m long and 2.0 mm in diameter supports a 10.0-kg fixture.By what distance did this fixture stretch the wire? Young's modulus for brass is 10 × 10¹⁰ N/m².

A sealed container holds 0.020 moles of ideal nitrogen (N₂)gas,at a pressure of 1.5 atm and a temperature of 290 K.The atomic mass of nitrogen is 14.0 g/mol.How many molecules of nitrogen are in the container? (R = 8.31 J/mol ∙ K,1 atm = 101 kPa)

A 50-kg load is suspended from a steel wire of diameter 1.0 mm and length 11.2 m.By what distance will the wire stretch? Young's modulus for steel is 2.0 × 10¹¹ Pa.

The figure shows a graph of the temperature of a pure substance as a function of time as heat is added to it at a constant rate in a closed container.If L_F is the latent heat of fusion of this substance and L_V is its latent heat of vaporization,what is the value of the ratio L_V/L_F?