1. During an experiment, a student added 35 J of heat to a system. At the same time, the environment performs 54 J of work on the system. (a) What is the change in the internal energy of the system? Does the internal energy increase or decrease? (b) If the system consists of two moles of an ideal gas at temperature of 79 degrees Celsius, what is its final temperature? (Cv of the gas = 12.5 J/mol K)

Q: 4. An amount of heat equal to 2500 J is added to a system, and 1800 J of work is done on the system.…

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Q: A 1423 kg car is traveling down the road at 94.2 km/h. While traveling at this rate of speed, what…

A: The kinetic energy of any moving objects is 12mv2, where m is the mass of the object and v is the…

Q: When methanol, CH, OH, is burned in the presence of oxygen gas, O2, a large amount of heat energy is…

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

Q: 6.111 In a calorimetric experiment, 6.48 g of lithium hy- droxide, LİOH, was dissolved in water. The…

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Q: if a system does 25 J of work on its surroundings and is cooled by 35 J, what is the net energy…

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Q: What is the change in internal energy of a system if the system (a) absorbs 58 J of heat and does 58…

A: Given information, (a) System absorbs 58 J of heat and does 58 J of work (b) System absorbs 125 J of…

Q: When methanol, CH,OH, is burned in the presence of oxygen gas, 0,, a large amount of heat energy is…

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Q: If a system produces 123.0 kJ of heat and does 45.0 kJ of work on the surroundings, what is the AE…

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Q: Consider the reaction: CH,OHØ) + 30, )→200,(e) + 3H,O), AH=-1.37 x 10' k When a 21.1-g sample of…

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Q: If a system has 48 J of work done on it and absorbs 22 J of heat, what is the value of AE for this…

A: Given: Work done on the system (w) = +48 J Amount of heat absorbed = +22 J

Q: 4. A system receives 75 J of electrical work, delivers 274 J of expansion work, and absorbs 168 J of…

A: Givens :   Work done by the system ,                         W   = 274 joules Heat absorbed by the…

Q: When 2.00 moles HCl(aq) and 0.500 moles of NaOH(aq) react, the heat released by the reaction is…

A: Given,  2.00 moles HCl(aq) and 0.500 moles of NaOH(aq) react. The chemical reaction,  HCl(aq) +…

Q: A system does 566 kJ of work and loses 216 kJ of heat to the surroundings. What is the change in…

A: From the first law of thermodynamic's... Q = ∆E + W Work done by the system = positive Heat losses…

Q: Consider the equation for the combustion of acetone(C3H6O), the main ingredient in nail polish…

A: Combustion is burning of fuels in the presence of oxygen. It is a highly exothermic reaction and…

Q: 4. A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 73…

A: Q = ∆E + W For work done on the system: W = -ve For work done on by the system: W = +ve

Q: The change in the internal energy of a system (ΔE) is -74 J. What is the work done when the system…

A: We have to calculate the work done.

Q: What is the change in internal energy for a system which loses 422 J of heat, and on which 227 J of…

A: According to first law of thermodynamics the change in internal energy is expressed as shown below:

Q: A system receives 825 J of heat and delivers 825 J of work to its surroundings. What is the change…

A: Given:Heat received by system, dQ = 825Jwork done by system, dW=825Jchange in internal energy, dU…

Q: What is the change in internal energy (in J) of a system thatabsorbs 0.615 kJ of heat from its…

A: The relation between change in energy, heat, and work is given as: ∆E=q+w

Q: 2. What is the heat capacity of 25.0 g of ethyl alcohol if its specific heat is 2.42 J/g C?

A: Given is 25.0 g ethyl alcohol  Heat capacity  = Hc = 2.42 J/g°C Specific heat = ?

Q: The specific heat of water is 4.18 J (g x Celcius). Calculate the molar heat capacity of water.

A: Specific heat of water is 4.18 J / g 0C. That means amounts of heat required by 1 mol of water to…

Q: A piece of a metal of a mass 4.68g absorbs 256J of heat when its temperature increases by 182C. What…

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Q: When methanol, CH,OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A: Enthalpy of reaction = - 764 kJ/mol Energy required = 729 kJ We need to find mass of methanol to be…

Q: 1. A system receives 425 J of heat and delivers 425 J of work toits surroundings. What is the change…

A: We have to calculate the change of internal energy of system.

Q: A piece of copper metal is initially at 100.0°C. It is dropped into a coffee cup calorimeter…

A: Given data,

Q: 3. A gas does 135 J of work while expanding, and at the same time, it absorbs 156 J of heat. What is…

A: Given: (3) work done by gas=135J Absorbed heat=156J To find: change in internal energy of the…

Q: 4-A system suffers an increase in internal energy of 80 J and at the same time has 50 J of work done…

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Q: If 800 J of heat is added to a system when it does 500 J of work, what is the change in internal…

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Q: If the water in a coffee cup calorimeter absorbed 300 J of energy (q = +300 J) during a reaction…

A: Energy absorbed by water in coffee cup calorimeter = 300 J qwater = + 300 J

Q: A system receives 315J of heat and delivers 200. J of work to its surroundings, what is the change…

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Q: ) If a gas absorbs 2.0 J of heat from the surroundings and then performs 15.2 J of work, what is the…

A: • The values provided in the question are:-       i) Quantity of heat absorbed by the gas, Q = 2.0 J…

Q: 1)What is the specific heat if 24.8 g of a metal absorbs 275 J of energy and the temperature rises…

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Q: 2. Consider the following reaction in a container with a movable piston: A + B, (), The AE for this…

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Q: A system receives 425 J of heat and delivers 425 J of work toits surroundings. What is the change in…

A: According to first law of thermodynamics, ∆U = ∆Q - ∆W

Q: 4. What speed must a 250.0 kg motorcycle be travelling at to have a kinetic energy of 2.8 x 10* J?

A: We nees to find the speed of motorcycle if, kinetic energy = 2.8×104 J and, mass = 250.0 kg

Q: If a system has 375 kcal of work done to it, and releases 5.00 x 10² kJ of heat into its…

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Q: A system suffers an increase in internal energy of 80 J and at the same time has 50 J of work done…

A: Given : Increase in internal energy ( U ) = +80 J Work done on the system ( W ) = +50 J Heat change…

Q: What is the internal energy of the system that absorbs 90 J of heat and 15 J work done by the…

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Q: A gas expands and does work on the surroundings equal to 2.17 L atm. At the same time, it releases…

A: First law of thermodynamics It states that the internal energy of a system is equal to the heat…

Q: For a process, 153 J of heat was released by the system and 267 J of work was done on the system.…

A: Thermodynamics is branch of chemistry in which we deal with heat absorbed and heat released in to…

Q: If a system absorbs 155.0 kJ of heat from its surroundings and the system does 75.0 kJ of work on…

A: Answer :-  The change in internal energy of the system is  +80.0 kJ.…

Q: If a system has 20.5 J of heat added to it, and the system does 75.5 J of work on its surroundings,…

A: Given:  Heat consumed by the system is 20.5 J, and the work done by the system on the surrounding is…

Q: The enthalpy change when a strong acid is neutralized by strong base is -56.1 kJ/mol. If 25.0 mL of…

A: HBr + NaOH → NaBr + H2O    First calculate the millimoles of each reactant to find the limiting…

Q: When a 13.3 g sample of NaOH(s) dissolves in 386.0 mL water in a coffee cup calorimeter, the…

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Q: The ΔE of a system that absorbs 12.4 J of heat and does 4.2 J of work on the surroundings is…

A: Recall the following expression from first law of thermodynamics            ∆E=q + wHere,change in…

Q: Calculate the temperature change when 5.76J of heat is released in a calorimeter having a heat…

A: Heat release= heat capacity* rise in temperature

Q: of

A: According to 1st law of thermodynamics  Change in internal energy= Q-W Q= heat added to the system…

Q: If a system has 475 kcal of work done to it, and releases 5.00 x 102 kJ of heat into its…

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Q: If 30.0 g H20 at 85.0°C is mixed in a coffee-cup calorimeter with 15.0 g H20 at 20.0°C, what is the…

A: Heat produced or absorbed by water = mass of water x specific heat of water x temperature difference

Q: -. The contents of the closed box in each of the following illustrations represent a system, and the…

A: Since numerical values of w or Q are not given, we have to use sign convention to find the sign of…