For the following processes, calculate the change in internalenergy of the system and determine whether the process isendothermic or exothermic: (a) A balloon is cooled by removing0.655 kJ of heat. It shrinks on cooling, and the atmospheredoes 382 J of work on the balloon. (b) A 100.0-g barof gold is heated from 25 °C to 50 °C during which it absorbs322 J of heat. Assume the volume of the gold bar remainsconstant.

Q: The molar heat capacity at constant pressure of carbon dioxide is 29.14 J K-1 mol-1. (a) What is the…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Automobiles and trucks pollute the air with NO. At 2000.0°C, Kc for the reaction is 4.62  × 10–4,…

A: Solution- van't Hoff equation:  InK2K1= -AHRx 1T2-1T1K1 = 4.62 x 10-4, K2 = ? T1 = 2000oC= 2273.15…

Q: A small piece of calcium carbonate was placed in a constant-volume calorimeter (Ccal=0.488  kJ/°C),…

A: Given data :  1. Ccal=0.488 kJ/°C 2. Change in temperature = 3.5 oC

Q: The standard enthalpy change of combustion [to CO2(g) and H20(€)] at 25°C of the organic liquid…

A: The combustion reaction can be given as: The given information is: According to the standard…

Q: A battery harnesses a chemical reaction to extract energy in the form of useful electrical work. (a)…

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Q: In a coffee cup calorimeter, a student places 0.500 g of calcium, followed by addition of 50.0 mL of…

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Q: Consider the reaction:  2H2 + O2 yields to 2H2O     Delta H of the reaction = -484 KJ   What is…

A: The reaction is 2H2 + O2 →2H2O ....∆H = -484 KJ

Q: Consider the reaction: MgO(s) + H2O -> Mg(OH)2 0.650g of Magnesium Oxide (MgO) is placed in 100mL…

A: The heat of the reaction is given by: q = mc∆THere, q is the heatm is the massc is the specific…

Q: The standard heat of combustion of gaseous cyclopentane, C5H10(g), was measured to be −3319.5…

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Q: Assume that a particular reaction evolves 244kJ of heat and that 35kJ of PV work is gained by the…

A: Given that: Heat evolved (q) = -244 kJ (negative sign indicate that heat is released) P∆V = -35 kJ…

Q: When a 7.00 g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of…

A:

Q: 5.115 A quantity of 50.0 mL of 0.200 M Ba(OH)2 is mixedwith 50.0 mL of 0.400 M HNO3 in a…

A: The balanced chemical equation is given as, BaOH2(aq)+2HNO3aq→BaNO32aq+2H2Ol The required amount of…

Q: 3. Methanol (CH,OH) is a clean-burning liquid fuel proposed as a replacement for gasoline. Suppose…

A: Answer: -164.05 KJ is the standard reaction enthalpy for the formation of 1 mol methanol from…

Q: When a 3.00 g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of…

A:

Q: 4. a) What is the enthalpy change for a system undergoing a volume change of 500.0 mL to 25.0mL…

A: Given that -  Volume change of a system, ∆V = Vfinal - Vinitial =  25 - 500 = -475 Pressure ,P = 435…

Q: A chemist wastes a delicious brownie by burning it in a bomb calorimeter.  Before burning, the…

A: Given: The change in temperature of the calorimeter, (∆T) = 8.75 0C. The heat capacity of…

Q: When 23.6g of calcium chloride, Was dissolved in water in a constant pressure calorimeter, the…

A: For heat capacity ,heat and temperature ,there is a relation for all: q=c×△TWhere:q= Heat…

Q: For the transfer of heat from a cold object A at -24oC to a hot object B at +25oC, is the value of…

A: Generally, heat continues to transfer until both systems reach same temperature.

Q: 0.015L of 3mol/L NaOH mixes in a calorimeter with 0.013L of 3mol/L HCl, the two initially at 295K,…

A: Given : Concentration of NaOH = 3.00 M Concentration of HCl = 3.00 M Volume of NaOH solution = 0.015…

Q: If a system has 325 keal of work done to it, and releases S5.00 x 10 kJ of heat into its…

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Q: Acetylene gas, C2H2(g), is used in welding. (a) Write abalanced equation for the combustion of…

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Q: a system recieves 425J of heat and delivers 425J of work toits surroundings. what is the change in…

A: Given Heat ( q ) = +425 J ( as heat is received to system ) Work ( w) = +425 J ( as work done by…

Q: A 13.6 g metal block is warmed to 79.7°C and plunged into an insulated calorimeter containing 46.2 g…

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Q: Calculate ΔH in kJ for the reaction: 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(l) given that the standard…

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Q: When 2.76 g of cesium perchlorate (CsClo,) is dissolved in 103 g of water in a styrofoam calorimeter…

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Q: A 12.99 g sample of copper that is at 7.9 °C is added to 1.00 g of hot water is initially at 93.2…

A:

Q: Hydrogen cyanide is used in the manufacture of clear plastic such as plexiglas. it is prepared from…

A: Given reaction: 2NH3 (g) + 3O2 (g)  + 2CH4 (g)  ---->  2HCN(g)  + 6H2O(g)  Enthalpy change of the…

Q: 50.0 mL of a solution of HCl is combined with 100.0 mL of 1.05M NaOH in a calorimeter. The reaction…

A: Volume of HCl = 50 mL Volume of NaOH = 100 mL Molarity of NaOH = 1.15 T = 22. 4 (before reaction) T…

Q: In a coffee cup calorimeter, a student places 0.500 g of calcium, followed by addition of 50.0 mL of…

A: Ca(s) reacts with hydrochloric acid(HCl) through the following reaction. Ca(s) + 2HCl(aq)  ---->…

Q: Calculate AH (in kJ/mol NH,NO3) for the solution process NH,NO3 (s) → NH; (aq) + NO, (ag) Assume…

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Q: Aqueous ethylene glycol is commonly used in car radiatorsas an antifreeze and coolant. A 50%…

A: Given : Mass of solution = 4.0 Kg  Heat absorbed by the solution = 250 KJ  Specific heat capacity of…

Q: If the temperature of a system of one mole of an ideal gas is changed from T1°C to T2-2T1 °C is…

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Q: a system receives 75.0 joules of electric work, delivers 274.0 joules of expansion work and absorbs…

A: A system receive 75 joule of electric work amd deliver 274 joule of expansion work and it absorb 168…

Q: In an isolated system 1000 J of heat is added to an ideal monatomic gas, while the gas performs 500…

A: From data Q= +1000J (positive as it is positive in case of heat is added to system as per chemistry…

Q: Given that the heat of formation for AgNO3  (s) is -124.4 kJ/mol, At standard conditions, what is…

A: Since moles = mass / molar mass  Hence moles of AgNO3 reacting = 56 / 169.9 = 0.3296

Q: Dry air containing a small amount of CO was passedthrough a tube containing a catalyst for the…

A: The equation for the oxidation reaction of carbon monoxide is: 2CO (s) + O2 (g) → 2 CO2 (g)

Q: Hydrogen cyanide is used in the manufacture of clear plastic such as plexiglas. it is prepared from…

A: For per mole of given reaction means 2 mole of NH3 releases 948.4 KJ of energy.  So 1 mole of NH3 on…

Q: Calculate the magnitude of q for a system that does 508000 kJ of work on its surroundings and for…

A: Given information,

Q: For the process: 4 Al(s) + 3 O2(g) → 2 Al2O3(s), AH = -3352 kJ. What is the value, in kJ/mol, for…

A: The concept: First, you have to find for how many moles of Al(s), the delta H is provided in the…

Q: initial temperature of the water was 20.5ºC, and the final temperature of the metal and water was…

A: Heat (q) = ms.□T Where  m = mass of substance  s =specific Heat capacity  □T = Temperature…

Q: The following combustion reaction was carried out using 3.88 g O2 and excess CH4. CH4 + 2O2 → CO2 +…

A: Methane reacts with oxygen to form carbon dioxide and water. The balanced chemical equation is as…

Q: electrical work, delivers 274.0 Joules of expansion work, and absorbs 168.0 Joules of heat. How many…

A: From first law of thermodynamics,  □E = q + w Where, □E = change in interanal energy  q = heat w =…

Q: When Ca(OH)2 is dissolved in water, it is known that the enthalpy of solution (AHsoln) is -16.2…

A: Given: Mass of Ca(OH)2 dissolved = 54 g. ΔHsoln of Ca(OH)2 = -16.2 KJ/mol. And volume of water =…

Q: An ideal gas sealed in a rigid 3.13-L cylinder, initially at pressure Pi=12.70 atm, is cooled until…

A: Given information, Volume of gas = 3.13 L Initial pressure (Pi) = 12.70 atm Final pressure (Pf) =…

Q: A change in a system occurs such that 31.1 J of work is done by the surroundings and 22.4 J of heat…

A: Internal energy is the stored energy of the system. From the first law of thermodynamics it is clear…