A gas expands as shown in the graph.If the heat taken in during this process is 1.02 × 106 J and 1 atm = 1.01 × 105 N/m2,the change in internal energy of the gas (in J)is

A) −2.42 × 106 B) −1.40 × 106 C) −1.02 × 106 D) 1.02 × 106 E) 1.40 × 106 A) −2.42 × 106 B) −1.40 × 106 C) −1.02 × 106 D) 1.02 × 106 E) 1.40 × 106

A child has a temperature of 101°F.If her total cross-sectional area is 2 m2,find the energy lost each second (in W)due to radiation,assuming the emissivity is 1.(Assume the room temperature is 70°F. )

A) 217 B) 180 C) 90 D) 68 E) 850 A) 217 B) 180 C) 90 D) 68 E) 850

The Earth intercepts 1.27 × 1017 W of radiant energy from the Sun.Suppose the Earth,of volume 1.08 × 1021 m3,was composed of water.How long would it take for the Earth at 0°C to reach 100°C,if none of the energy was radiated or reflected back out into space?

A) 26.9 y B) 113 y C) 2.69 × 104 y D) 1.13 × 105 y E) 2.69 × 107 y A) 26.9 y B) 113 y C) 2.69 × 104 y D) 1.13 × 105 y E) 2.69 × 107 y

Exam 20: The First Law of Thermodynamics

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A gas expands as shown in the graph.If the heat taken in during this process is 1.02 × 10⁶ J and 1 atm = 1.01 × 10⁵ N/m²,the change in internal energy of the gas (in J)is

(Multiple Choice)

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Question 41

A 100-g cube of ice is heated from −120°C to +120°C.In which of the following processes is the greatest amount of energy absorbed by this material?

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Question 42

A 5-kg piece of lead (specific heat 0.03 cal/g⋅°C)having a temperature of 80°C is added to 500 g of water having a temperature of 20°C.What is the final equilibrium temperature (in °C)of the system?

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Question 43

For an astronaut working outside a spaceship,the greatest loss of heat would occur by means of

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Question 44

A child has a temperature of 101°F.If her total cross-sectional area is 2 m²,find the energy lost each second (in W)due to radiation,assuming the emissivity is 1.(Assume the room temperature is 70°F. )

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Question 45

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter,but worst for keeping a house cool in summer.Sapphire insists the reverse is true: low thermal conductivity is good in the summer,but bad in the winter.Which one,if either is correct?

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Question 46

Two kilograms of water at 100°C is converted to steam at 1 atm.Find the change in internal energy (in J).(L_v = 2.26 × 10⁶ J/kg. )

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Question 47

How many calories of heat are required to raise the temperature of 4 kg of water from 50°F to the boiling point?

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Question 48

A block of material of mass m and specific heat c falls from height h and reaches speed v just before striking the ground.Its temperature is measured immediately after it strikes the ground.If we ignore any change in temperature owing to interaction with the air,the change in temperature of the block of material is

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Question 49

A styrofoam container used as a picnic cooler contains a block of ice at 0°C.If 225 grams of ice melts in 1 hour,how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 × 10⁵ J/kg).

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Question 50

Five moles of an ideal gas expands isothermally at 100°C to five times its initial volume.Find the heat flow into the system.

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Question 51

How much heat,in joules,is required to convert 1.00 kg of ice at 0°C into steam at 100°C? (L_ice = 333 J/g;L_steam = 2.26 × 10³ J/g. )

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Question 52

In a thermodynamic process,the internal energy of a system in a container with adiabatic walls decreases by 800 J.Which statement is correct?

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Question 53

If 25 kg of ice at 0°C is combined with 4 kg of steam at 100°C,what will be the final equilibrium temperature (in °C)of the system?

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Question 54

Steel blocks A and B,which have equal masses,are at T_A = 300 °C and T_B = 400 °C.Block C,with m_C = 2m_A,is at T_C = 350 °C.Blocks A and B are placed in contact,isolated,and allowed to come into equilibrium.Then they are placed in contact with block C.At that instant,

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Question 55

In an isothermal process

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Question 56

Gas in a container expands at a constant pressure of 3 atm.Find the work done (in J)by the gas if the initial volume is 5 liters and the final volume is 10 liters.

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Question 57

Which of the following statements is correct?

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Question 58

The Earth intercepts 1.27 × 10¹⁷ W of radiant energy from the Sun.Suppose the Earth,of volume 1.08 × 10²¹ m³,was composed of water.How long would it take for the Earth at 0°C to reach 100°C,if none of the energy was radiated or reflected back out into space?

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Question 59

Which of the following substances has the greatest specific heat?

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Question 60

Showing 41 - 60 of 61

Exam 20: The First Law of Thermodynamics

A gas expands as shown in the graph.If the heat taken in during this process is 1.02 × 106 J and 1 atm = 1.01 × 105 N/m2,the change in internal energy of the gas (in J)is

A 100-g cube of ice is heated from −120°C to +120°C.In which of the following processes is the greatest amount of energy absorbed by this material?

A 5-kg piece of lead (specific heat 0.03 cal/g⋅°C)having a temperature of 80°C is added to 500 g of water having a temperature of 20°C.What is the final equilibrium temperature (in °C)of the system?

For an astronaut working outside a spaceship,the greatest loss of heat would occur by means of

A child has a temperature of 101°F.If her total cross-sectional area is 2 m2,find the energy lost each second (in W)due to radiation,assuming the emissivity is 1.(Assume the room temperature is 70°F. )

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter,but worst for keeping a house cool in summer.Sapphire insists the reverse is true: low thermal conductivity is good in the summer,but bad in the winter.Which one,if either is correct?

Two kilograms of water at 100°C is converted to steam at 1 atm.Find the change in internal energy (in J).(Lv = 2.26 × 106 J/kg. )

How many calories of heat are required to raise the temperature of 4 kg of water from 50°F to the boiling point?

A styrofoam container used as a picnic cooler contains a block of ice at 0°C.If 225 grams of ice melts in 1 hour,how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 × 105 J/kg).

Five moles of an ideal gas expands isothermally at 100°C to five times its initial volume.Find the heat flow into the system.

How much heat,in joules,is required to convert 1.00 kg of ice at 0°C into steam at 100°C? (Lice = 333 J/g;Lsteam = 2.26 × 103 J/g. )

In a thermodynamic process,the internal energy of a system in a container with adiabatic walls decreases by 800 J.Which statement is correct?

If 25 kg of ice at 0°C is combined with 4 kg of steam at 100°C,what will be the final equilibrium temperature (in °C)of the system?

Steel blocks A and B,which have equal masses,are at TA = 300 °C and TB = 400 °C.Block C,with mC = 2mA,is at TC = 350 °C.Blocks A and B are placed in contact,isolated,and allowed to come into equilibrium.Then they are placed in contact with block C.At that instant,

In an isothermal process

Gas in a container expands at a constant pressure of 3 atm.Find the work done (in J)by the gas if the initial volume is 5 liters and the final volume is 10 liters.

Which of the following statements is correct?

The Earth intercepts 1.27 × 1017 W of radiant energy from the Sun.Suppose the Earth,of volume 1.08 × 1021 m3,was composed of water.How long would it take for the Earth at 0°C to reach 100°C,if none of the energy was radiated or reflected back out into space?

Which of the following substances has the greatest specific heat?

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A gas expands as shown in the graph.If the heat taken in during this process is 1.02 × 10⁶ J and 1 atm = 1.01 × 10⁵ N/m²,the change in internal energy of the gas (in J)is

A child has a temperature of 101°F.If her total cross-sectional area is 2 m²,find the energy lost each second (in W)due to radiation,assuming the emissivity is 1.(Assume the room temperature is 70°F. )

Two kilograms of water at 100°C is converted to steam at 1 atm.Find the change in internal energy (in J).(L_v = 2.26 × 10⁶ J/kg. )

A styrofoam container used as a picnic cooler contains a block of ice at 0°C.If 225 grams of ice melts in 1 hour,how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 × 10⁵ J/kg).

How much heat,in joules,is required to convert 1.00 kg of ice at 0°C into steam at 100°C? (L_ice = 333 J/g;L_steam = 2.26 × 10³ J/g. )

Steel blocks A and B,which have equal masses,are at T_A = 300 °C and T_B = 400 °C.Block C,with m_C = 2m_A,is at T_C = 350 °C.Blocks A and B are placed in contact,isolated,and allowed to come into equilibrium.Then they are placed in contact with block C.At that instant,

The Earth intercepts 1.27 × 10¹⁷ W of radiant energy from the Sun.Suppose the Earth,of volume 1.08 × 10²¹ m³,was composed of water.How long would it take for the Earth at 0°C to reach 100°C,if none of the energy was radiated or reflected back out into space?