[References] If your air conditioner is more than several years old, it may use the chlorofluorocarbon CCl2 F2 as the heat transfer fluid. The normal boiling point of CCl₂ F2 is -29.8 °C, and the enthalpy of vaporization is 20.11 kJ/mol. The gas and the liquid have molar heat capacities of 117.2 J/mol K and 72.3 J/mol K, respectively. How much energy is evolved as heat when 29.3 g of CCl2 F2 is cooled from +42.0 °C to -50.0 °C? Energy evolved =

Q: p.101edu.co Question 27 of 30 What amount of heat (in kJ) is required to convert 27.5 g of an…

A: Given Mass of unknown solid = 27.5 g T1 = -5°C T2 = 52.3°C

Q: Energy Constants for H2O 334 J/g = Heat of Fusion (Hf) 2260 J/g = Heat of Vaporization (Hv) 2.11…

A: Heat absorbed by the sample is calculated as follows: Heat = Heat required to convert ice to water…

Q: How much heat energy is required to convert 48.7 g of solid ethanol at -114.5 °C to gasesous ethanol…

A: To find the amount of energy required to convert 48.7 g of solid ethanol at -114.5oC to gaseous…

Q: The normal boiling point of naphthalene, C10H8, is 218 °C. What is the its enthalpy of vaporization…

A:

Q: How much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy…

A: The Answer to the following question is-

Q: Calculate the heat required to completely convert 8.25 g of solid benzene (heat of fusion 9.92…

A:

Q: a) What is the heat of vaporization of carbon tetrachloride, in kJ?

A:

Q: Calculate the heat, in kJ, exchanged in the conversion of 20.0 g of steam at 104 °C to ice at -10.5…

A: Given: Mass of water = 20.0 g = mMolar mass of water= 18.02 g/molTherefore, Moles of water= = 1.11…

Q: 15. Calorimetry a. How much heat needs to be taken from 0.5 kg of ethyl alcohol as a gas at its…

A: Q = mc∆T   Q = heat energy (Joules, J), m = mass of a substance (g)   c = specific heat (units…

Q: 12.2 g of ice at-68.3 °C is converted to ste am at 297.1 °C. Match the heat added to the process it…

A: Here, 12.2 g of ice at -68.30C is converted to steam at 297.10C. This can be solved using the phase…

Q: The vapor pressure, P, of a certain liquid was measured at two different temperatures, T. The data…

A: Given data for vapor pressures at different temperatures are :

Q: Liquid butane is used in cigarette lighters. The boiling point of butane at 1 atm pressure is -1.0…

A:

Q: Calculate the heat required to convert 18.6 g of propyl alcohol, C3H8O, from a solid at -150°C into…

A:

Q: If your air conditioner is more than several years old, it may use the chlorofluorocarbon CCl2 F2 as…

A:

Q: For Acetone, the normal boiling point is 45.6 ° C and the enthalpy of vaporization is 36.7 kJ/mol.…

A: The Clausius-Clapeyron equation that relates the pressure and temperature is  lnP2P1=-∆HvapR1T2-1T1…

Q: On a particular summer day, the temperature is 30.0°C and the relative humidity is 79.7% (which…

A: The expression of ideal gas equation is shown below: PV = nRT Where; P = pressure V = volume n =…

Q: Determine the total amount of energy required to heat 17.5 g of ethanol at -90.0 °C to ethanol vapor…

A: The mass of one mole of ethanol is 46 g/mol. This implies that 17.5 g of ethanol constitutes 0.38…

Q: What amount of heat (in kJ) is required to convert 13.3 g of an unknown liquid (MM = 83.21 g/mol) at…

A:

Q: An organic solvent with a molar mass of 56.45 g/mol have a normal boiling point of 45.0 °C and a…

A: According to the question we have, Mass of liquid is given by = 24.0 g Specific heat capacity of the…

Q: How much energy is required to heat 100.0 g H2O from a liquid at 20.0°C to a complete gas at 100 °C?…

A:

Q: Calculate the total amount of emergy (in kJ) necessary to raise the temperature of 2.00L of ethanol…

A: given - volume = 2 L = 2000 cm3 density = 0.7849 g/cm3 final temperature = 78.3 oC initial…

Q: 15) ) Liquid ammonia, NH,(1), was once used in home refrigerators as the heat transfer fluid. The…

A: The total energy required can be divided into three parts. The energy required to heat the liquid…

Q: How much energy is required to heat 1.50 moles of dichloromethane (CH3Cl2) from 30 °C to 60 °C? The…

A: The question is based on the concept of Hess law. It states that net enthalpy change for the…

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

A: This problem is based on Clausius Clapeyron equation.

Q: into

A: T1 = -151.0 °C T2 = 98.0 °C Tm =-117.3 °C Tb = 78.3 °C

Q: Part B How much heat is required to convert 21.5 g of ethanol at -150 °C to the vapor phase at 78…

A: mass of ethanol = 21.5 gram Initial temperature : To=-150 °C melting point: Tm=-114 °C boiling…

Q: 3. Sulfur Dioxide is an important molecule for production of sulfuric acid. It has a melting point…

A: The total amount of heat is calculated from the given conditions. From the given conditions the…

Q: A 0.488 mol sample of liquid propanol (60.09 g/mol) is heated from 25.7°C to 329.2C. The boiling…

A:

Q: The molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively,…

A: Molar heat of fusion of water = 6.02 kJ/mol  Molar heat of vapourisation of water = 40.6 kJ/mol…

Q: How much heat is released ( in J) when 54.0 g of water at 10.0 °C is cooled to form ice at - 10.0…

A: Given the mass of water, m = 54.0 g  The initial state is water at 10.0 oC.  The final state is ice…

Q: If your air conditioner is more than several years old, it may use the chlorofluorocarbon CCl₂F₂ as…

A:

Q: The vapor pressure of a certain substance increases by 2.7 times as the temperature increases from…

A:

Q: 15) Liquid ammonia, NH3(1), was once used in home refrigerators as the heat transfer fluid. The…

A: The total energy required can be divided into three parts. The energy required to heat the liquid…

Q: 3. Suppose that 1.15 g of rubbing alcohol (C3H8O) evaporates from a 65.0 g aluminum block. If the…

A: As per the answer guidelines I have to answer only one question until mention of doing all not given…

Q: Liquid ammonia can be used as a refrigerant and heat transfer fluid. How much energy is required to…

A: Given: Liquid NH3: mass = 25.0 gramsTemperature = -76°C (initial temperature)Cp (liquid ammonia) =…

Q: What amount of heat (in kJ) is required to convert 26.6 g of an unknown solid (MM = 92.14 g/mol) at…

A: Given : Initial temperature of solid = -115oC Final temperature of solid = 32.3 oC Mass of solid =…

Q: Lauric acid (C12H24O2) is 32.86 kJ/mol and enthalpy of ol. The melting point is 43.2°C. How much…

A: Given data are as follows Melting point =43.2 0C Heat capacity of solid= 2.15 J/g0C Heat capacity…

Q: much heat is needed to convert 986. g of ice at -10.0 °C to steam at 126.0 °C? Be sure your answer…

A:

Q: How much heat is released when 110 g of steam at 100.0°C is cooled to liquid at 15.0°C? The enthalpy…

A: Answer :           Heat released when 110 g of steam at 100.00C is cooled to liquid at 15.00C =…

Q: . A cooling bath is prepared in a laboratory by mixingchunks of solid CO2 with ethanol. CO2(s)…

A: cooling bath is a liquid mixture which is used to maintain low temperatures, typically between (-13…

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

A: The energy required to transfer a given amount of liquid into a gaseous state is known as the heat…

Q: 2H2 +N2--> 2NH3 With around 70% of ammonia produced industrially being used to make fertilizers. The…

A: Answer:-This question is answered by using the simple concept of calculation of heat energy required…

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.