Answer the following questions. Show complete solutions. Follow conventional way for significant figures and rounding off. How much heat is released by a system when 45 J of work is done on it to decrease its energy to 23 J?

Q: What is AE for a system which has the following two steps: Step 1: The system releases 50 J of heat…

A: In thermodynamics work done on the gas has positive energy value where as work done by the gas has…

Q: A beaker contained 62.09 g of water at 19.6°C. A 86.23-g sample of metal at 75°C was placed in it,…

A: Mass of water = 62.09 g Initial temperature of water = 19.60C Mass of metal = 86.23 g Initial…

Q: The mixture of gas and air inside a cylinder reacts, releasing 400kJ total energy. If the system…

A: Given:   The total energy is 400 kJ. The work done by system is 250 kJ.

Q: Enter your answer in the provided box. A system conducts 197 cal of heat to the surroundings while…

A: Recall the following expression from first law of thermodynamics          ∆U=q + w amount of heat…

Q: How much heat is given off to the surroundings when 7 g of aluminum reacts according to the…

A: The enthalpy of the reaction is considered as the state function that is it depends only on the…

Q: A system releases 689 kJ of heat and does 105 kJ of work on the surroundings. ▾ Part A What is the…

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Q: 125 mL of H20 is initially at room temperature (22.0°C). A chilled steel rod at 2.0°C is placed in…

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Q: The gas in a piston (defined as the system) is warmed and absorbs 645 J of heat. The expansion…

A: Given:Heat absorbed = 645 JWork performed =  340 JWhat is the change in internal energy ?

Q: I know the specific heat of a metal in J/gC. I know how to calculate the specific heat of the same…

A: The average specific heat is calculated by adding the specific heat of each trial and further…

Q: A 25.64 g sample of solid was heated in a test tube to 100.00 degrees celsius in boiling water and…

A: Given : mass of solid = 25.64 g Initial temperature of solid = 100.00 oC Mass of water = 50.00 g…

Q: When 116.0 mL of water at 26.0°C is mixed with 46.0 mL of water at 85.0°C, what is the final…

A: As per "Principle of Calorimetry", when any hot body gets mixed with cold body then the cold body…

Q: The mixture of gas and air inside a cylinder reacts, releasing 400 kJ of total energy. If the system…

A: 150 kJ of heat is released from the system

Q: How do I calculate the specific heat of metal if 1027 joules of energy are needed to raise the…

A: q = m .C . ΔT  WHERE  heat = q = 1027 J  mass of metal = m = 42.9 g specific heat of metal  = C =…

Q: A 45-g aluminum spoon (specific heat 0.88 J/g °C) at 24 °C is placed in 180 mL (180 g) of coffee at…

A: Use calorimetry principle to get answer Heat flow from high temperature to low temperature. Heat=…

Q: A system absorbs 191 kJ of heat and the surroundings do 110 kJ of work on the system. What is the…

A: Given:Heat energy Q = 191 kJ.Work done on the system W = 110 kJ.

Q: A student heats 68.15 grams of silver to 98.73 °C and then drops it into a cup containing 78.21…

A: All the information is given in question  Mass of silver and temperature  Mas software water and…

Q: In the laboratory a student finds that it takes 79.6 Joules to increase the temperature of 14.8…

A: The specific heat capacity of copper (C) can be calculated using equation (1). In this equation, m…

Q: 5) A 120.0-g piece of metal at 60.0 °C is placed in 150 g of water at 19.0 °C contained in a…

A: Calculating the heat released or absorbed for the process:            ......(1) In a system, the…

Q: 8. A 7.0-gram metal sample absorbed 211 J of heat as it was heated from 28°C to 85°C. W containing…

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Q: A system releases 50 kJ of heat while having 25 kJ of work done on it.The change in energy ΔE is?

A: According to the First law of Thermodynamics: where ∆E is the change in the Internal Energy of the…

Q: A system releases 125 kJ of heat while 104 kJ of work is done on it. Calculate ΔE.

A: Given: Heat energy released = -125 kJ Work done = 104 kJ

Q: Material A and material B was exposed to the same change in temperature, but the heat involved with…

A: The heat capacity is the amount of heat required to raise the temperature by one degree centigrade.…

Q: When 126.0 mL of water at 26.0 ° C is mixed with 66.0 mL of water at 85.0 ° C, what is the final…

A: Given are two samples of water.  The mass of water in two samples can be calculated as

Q: A student heats 61.27 grams of silver to 97.71 °C and then drops it into a cup containing 82.16…

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Q: 4. An unknown substance requires 567 J of heat to increase its temperature from 0 to 15 °C. The…

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Q: A 2.57 g sample of a substance suspected of being pure gold is warmed to 72.9 °C and submerged into…

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Q: The specific heat capacities for several substances are shown in the table. Substance Specific Heat…

A: Given :-  Substance          specific heat (J/g°C)  Iron                        0.45 Air…

Q: A metal radiator is made from 25.07 kg of iron. The specific heat of iron is 0.449 J/g °C. How much…

A: The mass of iron metal is = 25.07 kg The heat capacity of iron metal is = 0.449 J/goC Increase in…

Q: How much heat (J) can be absorbed by 1.500 kg of water and have the temperature of the water…

A: Given Mass of water = 1.500 kg temperature increase ΔT = 2.0°C

Q: In the laboratory a student finds that it takes 62.4 calories to increase the temperature of 15.0…

A: Given :-  Heat absorbed = 62.4 cal  Mass of Mg = 15.0 g  Initial temperature = 20.9 oC  final…

Q: When 156.0 mL of water at 26.0°C is mixed with 86.0 mL of water at 85.0°C, what is the final…

A: Convert the given mL of water into mass.Given, density of water = 1.00 g/mL

Q: A 20.94 g sample of a metal is heated to 99.4°C in a hot water bath until thermal equilibrium is…

A: The heat lost by the metal is determined as follows,

Q: A 32 gram piece of metal is heated to a temeprature of 100 degrees celcius and placed into water.…

A: The relationship between heat ( q ) , specific heat ( s ) and change in temperature ( ∆T ) is q =…

Q: Predict the total quantity of heat that would be required if you wanted to prepare a cup of instant…

A: Volume of cold water is 200 ml and density is 1.0 g/mL.Specific heat of water is 4.18 J.g.-1.°C-1…

Q: 4. INTERNAL ENERGY OF A SYSTEM a. Calculate the change in the internal energy of a liquid system…

A: According to the first law of thermodynamics, the change in internal energy is given by: ∆E = q +…

Q: A 25.0 g block of Al with specific heat 0.897 is placed into 100.0 g of water at 30.0°C. The final…

A: The heat lost by the hot body is equal to the heat gained by the cold body.

Q: Calculate the change in energy for the following processes and identify if the process is…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 839.0 g sample…

A: The mass of the substance is = 839.0 g The raise in the temperature of the substance is = 8.9oC -…

Q: Enter your answer in the provided box. A sheet of gold weighing 10.0 g and at a temperature of…

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Q: 27-gram piece of metal at 144  oC is dropped into 86 grams of water at 29 oC.  The water temperature…

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Q: 22.009 g of a metal at 100.15°C was added to 15.6 g of water at 18.01°C. The temperature of the…

A: The amount of heat transferred in a system is calculated as follows,…

Q: The air in an inflated balloon (defined as the system) warms over a toaster and absorbs 115 J of…

A: According to first law of thermodynamics, energy can neither be created nor destroyed, it can only…

Q: A system releases 125 kJ of heat while 104 kJ of work is done on it. Calculate ∆ E .

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Q: A 92.9-g piece of a metal is heated to 178.0 ºC, and then cooled to 29.7 °C by removing 14052.6 J of…

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Q: A sample of lead pellets with a mass of 26.47 g that has an initial temperature of 89.98 degrees C…

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Q: Calculate the specific heat of a metal if 45.0 grams of the metal at 100.0 °C, when placed into…

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Q: If a system does 62.0 kJ of work on its surroundings and releases 105 kJ of heat, what is the change…

A: Ca (s)  + 1/2 O2  (g)  -------> CaO (s)    ΔH°=-635kJ/mol to get desired equation we have to…

Q: How much heat is given off to the surroundings when 6 g of aluminum reacts according to the…

A: Thermodynamics is the branch of chemistry that mainly deals with the heat transfer between system…