A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 279.0 Torr at 45.0 °C. Calculate the value of AHap for this liquid. kJ/mol AHvap Calculate the normal boiling point of this liquid. boiling point:

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A: Option (C) 30°C is the correct choice.

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Q: 9.54 The phase change between graphite and diamond is dif- ficult to observe directly. Both…

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A: Answer

Q: If a 136.51 g Al rod (c = 0.900 J/g°C) is at 100.0°C and placed into 250.0 g of water at 21.8°C,…

A: Given : Mass of rod = 136.51 g Initial temperature of rod = 100.0 oC Mass of water = 250.0 g And…

Q: 1. Benzene (C6H6) boils at 80.1°C and its molar enthalpy of vaporization is AHvap=31.0 kJ/mol. a.…

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Q: Ozone (O3) in the atmosphere can react with nitric oxide (NO):          O3(g) + NO(g) --> NO2(g) +…

A: Record the given data, ΔH° = -199 kJ/mol ΔS° = - 4.1 J/K·mol Temperature, T = 25° C = 25 + 273 K =…

Q: For rubidium AH°, vap = 69.0 kJ/mol at 686°C, its boiling point. Calculate q for the vaporization of…

A: Given, molar heat of vaporization = 69.0 kJ/mol

Q: stimate the temperature required to decompose CaSO(s) into CaO(s) and SO3(g).

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Q: Calculate q when 0.10 g of ice is cooled from 10.°C to -75°C(cᵢ꜀ₑ=2.087 J/gK).

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Q: of O₂(g)? Choose ALL that apply. a. The addition of heat b. The removal of heat 2H₂S(g) + 30₂(g) →…

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Q: er antimony, Sb, the heat of fusion at its normal melting point of 631 °C is 19.6 kJ/mol. ne entropy…

A: Question is based on the concept of chemical thermodynamics. enthalpy of fusion is defined as the…

Q: Predict the sign for AGº, AH° and ASº for the condensation of gaseous nitrogen at – 201°C? The…

A: Given condensation reaction is:        N2(g) → N2(l) To predict the sign for ∆Go, ∆Ho, ∆So

Q: the heat of vaporization of water is 2260 J/g. determine q when 100 g of steam at 100 C is condensed…

A: Given that  Temperature = 100°C  heat of vaporization = 2260j/mol…

Q: Suppose some ice at 0ºC is placed into 50.00g of water at 25.5ºC. When the system reaches…

A: Here we are required to find the heat of fusion of ice Hf

Q: 3.15 mol of an unknown solid is placed into enough water to make 150.0 mL of solution. The…

A: Given moles (n) = 3.15 volume = 150 ml Temperature difference = 20.11°C specific heat (C) = 4.184…

Q: The molar heat of vaporization of ethanol is 39.3 kJ/mol and the boiling point of ethanol is 78.3°C.…

A: Entropy change of vaporization can be calculated by the following formula. ∆S=∆HvapT∆S=Entropy…

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Q: A 50.00 gram block of nickel metal is heated to a temperature of 180.0°C. The block is then dropped…

A: The formula that will be used here is as follows : Heat = mass of substance × specific heat of…

Q: Is isopropyl alcohol evaporating from skin  process exothermic or endothermic? Indicate the sign of…

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Q: A stainless steel lawn mower blade with a mass of 0.950 kg is being forged. During the process, the…

A: Heat released by steel is equal to heat gain by water.

Q: If a 136.51 g Al rod (c = 0.900 J/g°C) is at 100.0°C and placed into 250.0 g of water at 21.8°C,…

A: 1- at equilibrium, HeatAl = Heatwater   HeatAl = mass × specific heat × ∆T  HeatAl = mass × specific…

Q: 1. Consider the freezing of liquid water at - 10°C and 1 atm. For this process, what are the signs…

A: Freezing of water at -10℃ and 1 atm, H2O (l) ⇌ H2O (s)

Q: In a chemical reaction, two gases combine to form a solid. What do you expect for the sign of ∆S?

A: Entropy is a measure of randomness.The sign of change in entropy will come out to be negative if…

Q: When an instant hot pack is activated, aqueous sodium acetate crystallizes to form a solid and heat…

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Q: An ice cube with mass 9.53 grams (presume initial temperature (Ti) = 0 °C) is placed in a…

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Q: For rubidium ∆H°vap = 69.0 kJ/mol at 686°C, its boiling point. Calculate w and ∆E for the…

A: Solution :      Heat vaporization is defined as the amount of energy required added to the liquid to…

Q: A metal pellet with mass 25.0 g and temperature 90.0 °C is dropped into 100.0 g water originally at…

A: Given:  Mass of metal = 25.0 gm  Initial  temperature = 90.0 °C  Mass of water = 100 gm  Initial…

Q: Determine the AH° for the overall reaction based on the three-step thermochemical processes below:…

A: ∆H values -  Reaction 1 = 167.5 KJ  Reaction 2 = 341.4 KJ  Reaction 3 = 43.4 KJ  Final reaction = ?

Q: 1. The phase change between graphite and diamond is difficult to observe directly. Both substances…

A: According to Hess's law, the standard enthalpy change for a reaction is the sum of the standard…

Q: The normal melting point of benzene, C6H6, is 5.5 *CFor the process of melting, what is the sign of…

A: a) Since the process melting is converting solid into liquid Hence to convert solid into liquid we…

Q: The following information is given for mercury, Hg, at 1 atm: boiling point = 357 °C AH ap(357 °C) =…

A: The change in enthalpy of a chemical reaction is the total amount of heat released or absorbed in…

Q: Predict the signs of ΔH and ΔS for the freezing of water at -10 oC

A: Given  Process : Freezing of water  Sign of ∆H and ∆S = ?

Q: Without doing any calculations, match the following thermodynamic properties with their appropriate…

A: ∆S universe=0  ∆Grxn.  negative at higher temperatures, positive at lower temperatures

Q: Determine q

A: q = mc∆T  q is the amount of heat energy absorbed or released m is the mass of substance  c is the…

Q: Is a sparkler burning  process exothermic or endothermic? Indicate the sign of ∆H.

A: Is a sparkler burning  process exothermic or endothermic has to be given,

Q: If water goes from gas  to  liquid at a temp of 25 degree c what are the signs for delta h s and g

A: when water changes from gas to liquid According to Gibbs Helmontz equation, ΔG= ΔH – TΔS The…

Q: The vaporization of Br2 from the liquid to the gas state equires 7.4 kcal/mol (31.0 kJ/mol). a) What…

A: In this question, first we will discuss about sign of ∆H ( Change in Enthalpy ) for this…

Q: If a cube of ice at 0°C is placed outside on a warm summer day, the ice will melt spontaneously.…

A: Spontaneous reaction is the one which undergoes by itself without the aid of external help. For a…

Q: The following information is given for benzene, C6H6, at 1atm: AHvap(80.1 °C) = 30.7 kJ/mol boiling…

A: Here, we have to find the ∆H for the process of condensing 47.4 g of gaseous benzene at its normal…

Q: A 251 g piece of lead (SH=0.160 J/g degrees Celsius) with an initial temperature of 90.5 degrees…

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Q: 4.36)  Predict the sign of ΔH, ΔS, and ΔG of the system for the following processes at 1 atm: (a)…

A: (a)Heat energy is added to ammonia to get melt at -60.0 oC so ΔH >0.Disorder is increases in…

Q: Carbon monoxide, a toxic product from the incomplete combustion of fossil fuels, reacts with water…

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Q: Predict the sign of q for the process of water vapor condensation. 0 >b q >0 q =D0 Predict the sign…

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Q: Using the information in the table below, for which of these substances will vaporization be…

A: For vaporization of each substance calculate ∆G° . If its value comes out to be negative, then it is…

Q: What is the sign for ΔS for the system for each of the following processes?   Water and acetone mix…

A: Entropy increases when water and acetone mix to form a liquid solution because mixing two solutions…