Predict the signs of heat and work for the vaporization of ethanol: C2H6O (l) —> C2H60 (g) Options: A. -q and -w B. +q and -w C. -q and +w D. +q and +w

Q: 1. Consider the following reaction, which occurs at standard state: 2C1(g) C12(g) AH° = –243.4 kJ a.…

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Q: What is the change in internal energy for a system if the system absorbs 537 kJ of heat and does…

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Q: change in a system occurs such that 15.1 J of work is done by the surroundings and 40.1 J of heat…

A: Given; The work done on the system, (W) = 15.1 J. The heat or enthalpy of the system, (H) = 40.1 J.…

Q: 4. Use tabulated bond energies to estimate the enthalpy of reaction for each of the following gas…

A: Note: Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: What mass of oxygen is consumed when 285.5 kJ of energy is evolved from the combustion of a mixture…

A: Consider the given balanced reaction as;                          H2 g + 12 O2 g → H2O l…

Q: A metal is thought to be silver or iron. When 8.0 g of the metalabsorbs 23.50 J, its temperature…

A: (a) q = ms∆T 23.50 = 8.0 x s x ( 6.5 0 s = 0.45 J/g °C   (b) metal will be iron.

Q: 7. For the following scenarios what is the metal? a. A piece of metal weighing 59.047 g was heated…

A: Given,a, mass of metal = 59.047 gInitial temperature of metal = 100.0 oCvolume of water = 100.0…

Q: 1. A gas expands from 250 to 1000. mL at constant temperature. Calculate the worl done in joules…

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Q: A gas expands and does work on the surroundings equal to 279 J. At the same time, it absorbs 216 J…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: Which statement is true of the internal energy of the system and its surroundings following a…

A: Internal energy of a system is the summation of potential and kinetic energy of that system. Or the…

Q: One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is…

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Q: Consider: 2Al (s) + Fe203 (s) 2 Fe (s) + Al203 (s) in which AHO = -850. kJ. How many grams of Al are…

A: Given: 2Al(s) + Fe2O3(s) -----> 2Fe(s) + Al2O3(s).    ∆H = -850kJ

Q: The temperature of a constant amount of an ideal gas in a closed system at a fixed pressure, p₁, was…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 45. A50g sample of NaCl is added to a Styrofoam cup of water, and the change in water temperature is…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: N2(8) + 3H2(g) – 2NH3(g) AHn = -92.6 kJ/mol rxn If 2.0 moles of N, react with 6.0 moles of H, to…

A: The reaction given is  N2(g)+3H2(g)-------------> 2NH3(g) Ammonia can also be synthesized by the…

Q: What is the enthalpy change, Delta Hrxn, for the following reaction?      2 RbI (s)  +  Cl2 (g)…

A: Enthalpy is a state function, so we determine the change of enthalpy of a reaction by subtracting…

Q: Given the following thermochemical equations: 2NO(g) + O2(g) –→ 2NO2(g) AH° = -113.2 kJ %3D 2N,0(g)…

A: Calculate change enthlpy of the given reaction above----

Q: QUESTION 9 How many joules must be absorbed by 14.6g of manganese originally at 22.6°C to raise its…

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Q: 2. Mercury (II) oxide is a reddish mineral that is used as the cathode in mercury batteries. It is…

A: In the above question the heat energy require to prepare 2 mole Hg have given . We have to calculate…

Q: What is the enthalpy change, Delta Hrxn, for the following reaction?      2 RbI (s)  +  Cl2 (g)…

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Q: N2(g)+3H2(g)→2NH3(g) AH°rxn=-92.6 kJ/mol f 2.0 moles of N2 react with 6.0 moles of H2 to form NH3,…

A: Work is calculated by  W= nRT And for ∆U we will use first law of thermodynamics.

Q: A fuel-air mixture is placed in a cylinder fitted with a piston. The original volume of the mixture…

A: Formula : Work done , W = -935 J W =-Pext( Vf - Vi ) -935 = - 0.836 ( Vf - 0.310 ) x 101.3  Vf =…

Q: a) Consider the reaction N2(8) + 3H2(g) 2NH3(g) AHn = -92.6 kJ If 2 moles of N2 reacts with 6 moles…

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Q: Which of the following statements is incorrect concerning the thermochemical equation below?…

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Q: Consider the following reaction: 2 Mg + O2  2 MgO,  Hrxn = -1,203 kJ.Calculate the amount of heat…

A: The enthalpy change or heat released/absorbed during a chemical reaction as represented by a…

Q: A five liter cylinder contained 2 moles of oxygen gas at 20°C. Due to sudden leakage through the…

A: Initial volume (V) i = 5 L, P = 1 atm, T = (20 + 273) = 293 K, n = 2 moles From ideal gas law, P (V)…

Q: The specific heat capacity of silver is 0.24 J/°C.g. a. Calculate the energy required to raise the…

A: 1) Since the energy of heating process is given by Q = m C  ΔT where m = mass = 143 gC = specific…

Q: a b C d

A: Given: The internal energy change = -200 J For moving from c to d, required heat, Qcd = 180 J For…

Q: 2. A rubberized, cubic chamber was filled with butane gas and was expanded from 3.0L to 4.5L at a…

A: According to first law of thermodynamics, we have dU = q + w      -----(1) Where, dU is change in…

Q: 1. When gasoline burns in an automobile engine, the heat released (325 J) causes the products CO,…

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Q: Consider an ideal gas enclosed in a 1.00 L container at an internal pressure of 24.0 atm. Calculate…

A: Step 1: first we have to find work done by the gas against external force.- pexternal(v2-v1). Step…

Q: What is the enthalpy change, Delta Hrxn, for the following reaction?      2 RbI (s)  +  Cl2 (g)…

A: Given reaction2 RbI (s)  + Cl2(g) → 2 RbCl(s)  + I2(s)∆Hf0 (RbI,s) =-328 kJ/mole∆Hf0 (Cl2,g) = 0∆Hf0…