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 16.6 g of CCl₂ F2 is cooled from +38.0 °C to -48.0 °C? Energy evolved =

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 16.6 g of CCl₂ F2 is cooled from +38.0 °C to -48.0 °C? Energy evolved =

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

The normal melting point of aluminum is 655 0C and the normal boiling point is 2425 0C. The molar heat capacities of aluminum solid, aluminum liquid and aluminum gas are 24.35, 24.21, and 21.38 J/mol-K, respectively. The enthalpy of vaporization of aluminum is 11.370 kJ/g, and its enthalpy of fusion is 376 J/g. How much heat is released when 36.82 gram of 3732.78 0C aluminum gas changes to 78.1 0C solid? __________ kJ
. A cooling bath is prepared in a laboratory by mixingchunks of solid CO2 with ethanol. CO2(s) sublimes at-78.5°C to CO2(g). Ethanol freezes at -114.5°C andboils at 178.4°C. State the temperature of this coolingbath and describe what will be seen when it is preparedunder ordinary laboratory conditions.
The following information is given for benzene, C6H6, at 1atm: AHvap(80.1 °C) = 30.7 kJ/mol boiling point = 80.1 °C specific heat liquid = 1.74 J/g°C At a pressure of 1 atm, 13.2 boiling point of 80.1 °C. kJ of heat are needed to vaporize a 40.2 g sample of liquid benzene at its normal
Calculate the heat required to condense 25.3 g of gaseous water at 100 oC. (Please see attached image).
How long would it take to convert 100.0 grams of solid sodium at 20.0°C to sodium vapor at 1000.0°C if the heating rate at a pressure of one atm is 8.0 kJ?min–1? The melting point of sodium is 97.8°C; its boiling point is 883°C; its molar enthalpy of fusion is2.60 kJ?mol–1; its molar enthalpy of vaporization is 97.4 kJ?mol–1; and the heat capacities of solid, liquid, and gaseous sodium are 28.2 J?mol–1?K–1, 30.8 J?mol–1?K–1, and 20.8 J?mol–1?K–1, respectively. Answer: 70 mins, but i need the steps.
How much heat is required to convert 55.0g of liquid water at 22.0°C to steam at 105°C?
Liquid butane is used in cigarette lighters. The boiling point of butane at 1 atm pressure is -1.0 °C and its ∆H(vap) is 22.44 kJ/mol. R = 8.314 ×10⁻³ kJ/mol･K. Calculate the pressure (in atm) of the butane in the lighter at 29.0 °C.
Can you help with 1 and 2
Carbon tetrachloride, CCl4, was once used as a dry cleaning solvent, but is no longer used because it is carcinogenic. At 56.9°C, the vapor pressure of CCl4 is 54.6 kPa, and its enthalpy of vaporization is 29.82 kJ/mol. Use this information to estimate the normal boiling point (in °C) for CCl4.
A 0.439 mol sample of liquid propanol (60.09 g/mol) is heated from 25.6°C to 328.3PC. The boiling point of propanol is 206.6°C. The specific heat of liquid propanol is 2.40 J/g°C. The specific heat of propanol vapor is 1.42 J/g°C. The enthalpy of vaporization for propanol is 47.5 kJ/mol. What is the energy change of this process, in kJ?
A 0.589 g0.589 g sample of steam at 107.3 °C is condensed into a container with 5.92 g of water at 16.8 °C. What is the final temperature of the water mixture if no heat is lost? The specific heat of water is 4.18 J g⋅ °C, the specific heat of steam is 2.01 J g⋅ °C, and Δ?vap=−40.7 kJ/mol.
The normal boiling point of liquid pentane is 309 K. Assuming that its molar heat of vaporization is constant at 26.8 kJ/mol, the boiling point of C5H₁2 when the external pressure is 1.23 atm is K.