Consider a cyclic process involving a gas. If the pressure of the gas varies during the process but returns to the original value at the end, is it correct to write ΔH=qp?

Q: How much heat is liberated at constant pressure if 0.833 g of calcium carbonate reacts with 59.7 mL…

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Q: Automobiles and trucks pollute the air with NO. At 2000.0°C, Kc for the reaction…

A: The standard enthalpy of a chemical reaction is defined as the amount of heat that is absorbed or…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 273. kJ during a…

A: Given :  1. Change in Enthalpy = + 273 kJ  2. Work done = 122 kJ .

Q: For the reaction CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH* = −890.3 kJ and ΔS* = 243.0 J/K. What is…

A: Second law of Thermodynamics states that entropy of an isolated system always increases and heat…

Q: Calculate the work done (in Joules) during the combustion of hydrazine, a component of rocket fuel,…

A: For the given reaction, work done is calculated by using the formula as shown below : Work done =…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 291. kJ during a…

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Q: Solid lithium perchlorate dissolves in water according to the equation below. LiClO4 (s) ➝ Li+ (aq)…

A: Given: mass of  LiClO4 = 7.00 g mass of water = 40.0 g Initial temperature of water = 29.00 ºC…

Q: The addition of 107.0  g potassium fluoride to 607.0  mL of water (d = 1.00 g/mL) causes the…

A: Mass of KF = 107.0 grams Volume of water = 607.0 mL Density of water = 1.00 g/mL Mass of KF solution…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 225. kJ during a…

A: a.) To Calculate the change in energy of the gas mixture , we would use first law of thermodynamics.…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 236. kJ during a…

A: Given:Enthalpy = -236 kJ( enthalpy decreases, it's an exothermic process)Work done = -114…

Q: Consider the following chemical reaction and calculate the ΔHrxn using the data provided to the…

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Q: Measurements show that the energy of a mixture of gaseous reactants increases by 368. kJ during a…

A: We have to calculate the change in enthalpy and nature of reaction.

Q: Potassium cyanate dissolves in water according to the equation below. KCNO (s) ⟶ K+ (aq) + CNO−…

A: Potassium cyanate dissolves in water according to the equation below.KCNO (s) ⟶ K+ (aq) + CNO− (aq)…

Q: During an isothermal compression of an ideal gas, 410 J of heat must be removed from the gas to…

A: Since 410 J of heat is removed from the gas, Hence heat transfer (q) = - 410 J Since the compression…

Q: An ideal gas sealed in a rigid 4.81-L cylinder, initially at pressure Pi=12.50 atm, is cooled until…

A: The cylinder is rigid so volume is constant, so the process is ischoric. ∆V=0

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 369. kJ during a…

A: We have to calculate the change in enthalpy and nature of reaction.

Q: A₂H.(g) + 6 X₂(g) → 2 AX,(g) + 6 HX(g) A and X are unknown elements. When the reaction given above…

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Q: what volume of CO2 gas in Liters is produced if this reaction occurs at a pressure of 748 torr and…

A: We have to find what volume of CO2 gas in Liters is produced if this reaction occurs at a pressure…

Q: A piece of metal weighing  5.10 gg   at a temperature of  48.5 ∘C∘C   was placed in a calorimeter in…

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Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 104. kJ during a…

A: Hence reaction is endothermic..

Q: (b) Study the following thermochemical data very carefully: AH° = 242.3 kJ Cl2(g) → 2Cl(g) I2(g)…

A: The formation of compounds from its atoms in their stable sates at standard pressure and temperature…

Q: Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 35…

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Q: Determine the amount of heat (in kJ) associated with the production of 3.26 ×104 g of ammonia…

A: From the given reaction we can see that 2 moles of ammonia is formed when heat associated with the…

Q: The addition of 125.0  g potassium fluoride to 601.0  mL of water (d = 1.00 g/mL) causes the…

A: The mass of solute, KF is = 125.0 g The volume of solvent water = 601.0 mL The mass of solvent water…

Q: In a bomb calorimeter, the energy (ΔU) of CH4 gas at 25 0C and at a constant volume was measured…

A: Answer:- This question is answered by using the simple concept of calculation of enthalpy change.

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 175. kJ during a…

A: Answer :- 1. Change in enthalpy of gas mixture = ∆H = -254 kJ 2. Exothermic…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 160. kJ during a…

A:

Q: In a calorimetric experiment, 6.48 g of lithium hydroxide, LiOH, was dissolved in water. The…

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Q: Calcium carbonate can be decomposed upon applying heat with the following equation CaCO3(s)  →…

A: Calcium carbonate can be decomposed upon applying heat with the following equation: CaCO3(s)  →…

Q: Three moles of an ideal gas are compressed from 5.5 × 102 to 2.5 × 102 m3 . During the…

A: in isothermal process temperature is constant throughout the process.

Q: The specific heat capacity of liquid bromine is 0.226 J g^−1 K^−1. How much heat is required to…

A: In this question, we have to calculate the heat needed to raise the temperature of 31.2 g of bromine…

Q: Calculate the enthalpy change for the reaction C(graphite) + 2 H2(g) → CH4(g) with the help of the…

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Q: If you are using a calorimeter to measure the ΔHsolution of LiCl, which value of cp should you use…

A: Calorimeter: A calorimeter is a device used to measure the heat energy of a chemical reaction. To…

Q: The addition of 105.0  g potassium fluoride to 599.0  mL of water (d = 1.00 g/mL) causes the…

A: Given, Mass of potassium fluoride = 105.0g. Volume of water = 599.0mL. Density of water = 1.00g/mL.…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 254. kJ during a…

A: Given :- Q = +254 KJ positive because energy is absorbed by system W = +185 KJ positive because work…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 365. kJ during a…

A: Answer: This question is based on the first law of thermodynamics which is based on the conservation…