Consider two identical rooms, one with a refrigerator in it and the other without refrigerator. If all the doors and windows are closed, will the room that contains the refrigerator be cooler and warmer than the other room? Explain.

Q: When the door of a fridge is kept open for a long time, does it reduce the temperature in the room?…

A: No, opening the door of the fridge does not cool the room. A fridge is a heat pump which takes air…

Q: Which of the following is TRUE regarding the total heat Q absorbed by the engine in one cycle?

A: We know that change in internal energy of a system, the heat absorbed and work done are related by,…

Q: To increase the efficiency of a heat engine, would it be preferable to produce the same temperature…

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Q: When hot-air furnaces are used to heat a house, why is itimportant that there be a vent for air to…

A: A hot-air furnace heats primarily by air convection. For the convective currents to be completely…

Q: Consider the human body performing a strenuous exercise, such as lifting weights or riding a…

A: The first law of thermodynamics is valid in a human body in work. The internal energy stored in…

Q: A Carnot refrigerator exhausts heat to the air, which is at a temperature of 25 °C . How much power…

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Q: In outer space a rock with mass 6 kg, and velocity m/s, struck a rock with mass 17 kg and velocity…

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Q: Consider a room that is initially at the outdoor temperature of 20 C. The room contains a 60-W light…

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Q: A 58-kg cross-country skier glides over snow as in the figure below. The coefficient of friction…

A: Given: The mass of the skier is 58 kg. The coefficient of the kinetic friction is 0.18. The amount…

Q: Explain why heat pumps do not work as well in very cold climates as they do in milder ones. Is the…

A: The coefficient of performance of the heat pump is Suppose the temperature of the hot region is T1…

Q: Does a refrigerator full of food consume more power if the room temperature is 20C than if it is…

A: Coefficient of performance of the refrigerator is inversely proportional to the temperature…

Q: Explain the following simplified statements of the first and second laws of thermodynamics (a) First…

A: According to the first law of thermodynamics, energy can neither be created nor be destroyed. Here,…

Q: A heat pump is a device that absorbs energy from the cold outdoor air and transfers it to the warmer…

A: Second law of thermodynamics states that energy cannot be transferred from cold body to hot body…

Q: Should the cooling fluid for an engine have a large or a small heat capacity? Explain.

A: Given: Should the cooling fluid for an engine have a large or a small heat capacity? Explain.

Q: On a winter daya certain house 5.00 * 10 ^ 8 * J Jof heat to the outside (about 500,000 )What is the…

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Q: What does the Second Law of Thermodynamics say about how much work can be done by a heat engine?…

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Q: Suppose the volume of an ideal gas is doubled while the pressure is reduced by half. Does the…

A: Initially, equation of state is,

Q: Water put into the freezer compartment of your refrigerator goes to a state of less molecular…

A: No, this is not an exception to an entropy principle.

Q: Can a room be cooled indefinitely by leaving the door of the refrigerator open? Explain

A: The answer is no, the room will not be cooled for indefinitely by leaving door of the refrigerator…

Q: Could you cool a kitchen by leaving the refrigerator door open and closing the kitchen door and…

A: As we leave the door of the fridge open, the compressor will have to work more to cool the fridge…

Q: Which of the following can effectively lower the internal energy of a room? A A fan B A refrigerator…

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Q: Answer the following question in an essay form. Write the essay with at least 3 paragraphs.  Can…

A: Cooling or heating occurs with in the conductor by the process of heat transfer. The heat transfer…

Q: A large fraction of the thermal energy generated in the engine of a car is rejected to the air by…

A: Close System:  A type of system in which there is no exchange of matter with surrounding takes…

Q: How can we apply the first law of thermodynamics to heat engines, heatpumps, and refrigerators?

A: How can we apply the first law of thermodynamics to heat engines, heatpumps, and refrigerators.

Q: Based on the zeroth law of thermodynamics, explain why a can of soft drink remains at a constant…

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Q: Could you cool a kitchen by leaving the refrigerator door open and closing the kitchen doors and…

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Q: What is the difference between a Carnot engine and a Carnot refrigerator?

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Q: How can the third law of thermodynamics be stated in different ways?

A: Thermodynamics Third Law: At absolute zero which is T=0 K, System's entropy is approaches to zero.…

Q: A refrigerator moves heat from cold to warm. Why does this not violate the second law of…

A: According to second law of thermodynamics (Clausius statement) , it is impossible to develop a…

Q: Can you warm a kitchen in winter by leaving the ovendoor open? Can you cool the kitchen on a hot…

A: The First Law of Thermodynamics states that the heat transferred between a source of higher…

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.