Suppose a woman does 500 J of work and 9500 J of heat transfer occurs into the environment in the process. (a) What is the decrease in her internal energy (in kcal), assuming no change in temperature or consumption of food? (That is, there is no other energy transfer.) Answer __________ J

Q: On a cold day, a heat pump absorbs heat from the outside air at -10°C and transfers it into a home…

A: Given  Outside temperature TL=-100 C=273-10=263K Home temperature TH=300 C=273+30=303K

Q: A 4-ton air conditioner removes 5.06×107 J (48,000 British thermal units) from a cold environment in…

A: (a) Write the formula for the EER. Thus,

Q: When an ideal gas was compressed, its internal energy increased by 180 J and it gave off 150 J of…

A: Given: Increased internal energy ∆U=+180 J Heat given during compression ∆Q=-150 J

Q: Calculate the net work output (in J) of a heat engine following path ABCDA in the figure, where V1 =…

A: Write the given values from the diagram.

Q: You are boiling water in a pot on the stove for your herbal tea. There is 0.15kg of water in the pot…

A: Mass of water (M) = 0.15kg Initial state : Liquid at 100°C temperature Final state :  Solid at…

Q: Which of the following depends only on the initial and final state of the system? O work change in…

A: Quantities which only depend on initial and final position of the process irrespective of the path…

Q: A 4-ton air conditioner removes 5.06×107 J (48,000 British thermal units) from a cold environment in…

A: Given: air conditioner removes 5.06×107 J Or 48000 British thermal units Time 1 hr or 3600 sec (a)…

Q: In each of the following situations, find the change in internal energy of the system. (a) A system…

A:

Q: How much heat transfer occurs from a system, if its internal energy decreased by 50 J while it was…

A: given that,Internal energy decreased:∆U=- 50 Jwork done:∆W=120 J

Q: An engineer claims to have measured the characteristics of a heat engine that takes in 100 J of…

A: The expression for the ratio of the temperatures is,

Q: 300J of energy are transferred to a system in the form of heat while the thermal energy increase by…

A: Given data The change in internal energy is ∆U=150 J. The energy transferred to a system is ∆Q=300…

Q: A heat pump is a heating system that has an efficiency of about 150 %, that is, for every joule (J)…

A: Let us first look at the statement of Second Law of Thermodynamics, the Kelvin-Planck Statement:…

Q: A heat pump (COP = 2.5) is used to maintain a lab temperature at 15° C for that 80 MJ of heat to…

A: SOlution: to find the statement is crrect or not

Q: crate of fruit with a mass of 32.0 kg and a specific heat capacity of 3650 J/(kg⋅K) slides 8.80 mm…

A: According to work energy theorem Work done by net force = change in kinetic energy

Q: Find the required work to transfer 1200 J of heat from the sink (cold body) at -90° Cto source (hot…

A: The expression for the work done is given by

Q: Compute for the thermal efficiency of a truck that has input energy of 454 J and 223 J exhaust heat.

A: Given data:  Input heat energy (QH) = 454 J Waste heat energy (QL) = 223 J

Q: How much work can a heat engine emit for each kilogram of burned coal with an combustion heat of 16…

A:

Q: What is the maximum efficiency that a heat engine could have when operating between the normal…

A:

Q: In the steam engine, the amount of heat is 4.18J and work is 2.0J, what is the change in internal…

A: Amount of heat, Q = 4.18 J Work, W = 2.0 J Change in internal energy of the system, ∆U = ?

Q: A large electrical power station generates 921 MW of electricity with an efficiency of 39.6%.…

A:

Q: A system does 137 J of work on its environment and gains 95.3 J of heat in the process. Find the…

A: The work done by the system on the environment,

Q: During running, you lost 4.0×104 J of heat, and your internal energy also decreased by 1.6×105 J.…

A: Change in Internal energy, ∆U=-1.6×105J Heat lost, Q=-4.0×104J

Q: A syste m does 125 J of work on its environment and gains 88.9 J of heat in the process. Find the…

A: a. According to the first law of thermodynamics. So the change in the internal energy of the system…

Q: gas enclosed in a chamber absorbs 949.70 J of heat and during the same time does 353.61 J of work on…

A: Heat absorbed = 949.70 J  Hence, heat added to system q = - 949.70 J Work done by system W = 353.61…

Q: What is the change in internal energy of a car if you put 12.0 gal of gasoline into its tank? The…

A:

Q: What work done on the system if the change in internal energy results to - 300j when the system…

A: To determine: The work done on the system   Given: Change in internal energy, ∆U=-300 J Heat…

Q: Is the efficiency of a heat engine more in hilly areas than in the plains? Why?

A: Efficiency of heat engines depend on source and sink temperatures. η=1-TsinkTSourceFrom the above…

Q: A typical electric refrigerator has a power rating of 400 W, which is the rate (in J/s) at which…

A: The expression for find heat from the cold reservoir is W=Qh-QlQl=W-Qh

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

A:

Q: In moving out of a dormitory at the end of the semester, a student does 2.12x 104 J of work. In the…

A: according to 2md law of thermodynamics  Q = W + U      Q = heat given to the system W = work done b…

Q: Air flows steadily at a rate og 0.5 kg/s through an air compressor, entering at 7 m/s, 100 kPa of…

A: Air flow rate through the compressor,  m' = 0.5 kg/s  velocity of air at the inlet to compressor ,…

Q: What is the highest possible efficiency of a heat engine working between a high temperature…

A: Given TH=600℃ = 873K TC=20℃ = 293K we have to find efficiency Efficiency η = 1- (TC÷TH)

Q: Heat transfer is always from higher reservoir to lower reservoir and not the opposite because:…

A: In Higher temperature, the atoms and molecules are in excited state. They are thermally agitated.

Q: * A heat engine operates between 210 o C and 35 o C. The minimum amount of heat that must be…

A:

Q: When one gallon of gasoline is burned in a car engine,1.19x108J of internal energy is released.…

A: The amount of heat   Q=-1.0×108 J Change in internal energy is  ΔU=-1.19×108 J There is a loss of…

Q: On a cold day, a heat pump absorbs heat from the outside air at -10°C and transfers it into a home…

A: Given value--- cold temperatures = - 10 degree C. Hot temperatures = 30 degree C. We have to…

Q: A Carnot heat pump is used to heat and maintain a residential building at 22°C. An energy analysis…

A: Given : TH = 22°C = 22 + 273 = 295 K Q = 2500 kJ/h°C  TL = 4°C = 4 + 273 = 277 K

Q: While walking you give off 4.0x10^5J of heat and your internal energy decreased by 6.0x10^5 J. How…

A: Given information: Here, ΔQ is the heat released by the person’s body while walking, and ΔU is the…

Q: A heat pump is used to maintain a house at a constant temperature of 23°C. The house is losing heat…

A:

Q: Calculate q when 29 J of work is done on a system and its internal energy increases by 96 J

A: work done on the system=  29 J Increase in internal energy = 96 J

Q: If a machine does 74.76 kJ of work after an input of 88.36 kJ of heat, what is the change in…

A:

Q: A carnot device extracts 5.00 kJ of heat from a body at -10.00C. How much work is done if the device…

A: According to the Carnot's engine  Work done = Heat input - Heat output

Q: What is the change in internal energy of a system which does 6.5×105 J of work while 3.00×106 J of…

A:

Q: internal energy

A:

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.