Calculate the ASsys when 15.0 g of ice at -12.0 °C is converted into water vapor at 105.0°C and at a constant pressure of 1 bar. The molar Cp,m's and AH's are given above.

Calculate the amount of heat energy that must be removed from 75.3 g steam at 105 °C and 1.00 atm to form liquid water at 36 °C.

The boiling point of 3 pure substances is given below: benzene C 6H 6 (80.1 °C), chloroform CHCI 3 (61.2 °C) and pyridine C 6H 5N (115 °C). Which of the following statements is true about their properties? O a. Benezene is most viscose among 3 liquids at 25 °C. b. Pyridine has the lowest molar enthalpy of vaporization. OC. Chloroform has the greatest vapor pressure at 30 °C. O d. At 50 °C, benzene is gas. e. Chloroform has the lowest evaporation rate at 25 °C.

Two 20.0 g ice cubes at −12.0 ∘C−12.0⁢ ∘C are placed into 275 g275 g of water at 25.0 ∘C.25.0⁢ ∘C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature, ?f,Tf, of the water after all the ice melts.

Use the References to access important values if needed for this question. 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.

Carbon dioxide can exist as a liquid at room temperature at a pressure of 67 kPa O True False

Pentane C5H12 boils at 360C at 1 atmosphere pressure. What is the molar heat of vaporization in kJ/mol if the vapor pressure of pentane at 250C is 505 torr?

Use the plots in the figure here to rank the three liquids in order of increasing enthalpy of vaporization. 760- Pvap (torr) 900 800 700 600 500 400 300 200 100 34.6° Diethyl ether Ethanol 78.4° 100.0⁰ Water 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C) where the lines cross x = 0 In (Pap) Water 1/T (K) left plot: vapor pressure at the highest temperature displayed left plot: vapor pressure at the lowest temperature displayed right plot: relative slopes of the lines Diethyl ether Which aspects of the two sets of plots are useful for ranking the liquids in terms of enthalpy of vaporization? -Ethanol

A student collects data to determine the enthalpy of vaporization of water. Complete the following table for data collected at 42°C. Temperature   42°C     Temperature T    K   Report your answer to 2 decimal places Volume of Gas Bubble   6.4 mL     Volume V    L   Report your answer to 2 significant figures Height of the Water Column, h   45 mm     Mercury Equivalent of Water (MEW)     mm   Report your answer to 2 significant figures Barometric Pressure, Pbarometric   760.4 torr     Number of moles of air, nair   0.0002383 moles     R   62.364 L·torr/K·mol     Total Pressure of the Enclosed Gas Sample Ptotal    torr   Report your answer to 1 decimal place Partial Pressure of Air in the Gas Sample, Pair    torr   Report your answer to 1 decimal place Vapor Pressure of Water in the Gas Sample, Pwater    torr   Report your answer to 1 decimal place Natural log of the Vapor Pressure of Water in the Gas Sample, ln (Pwater)    torr   Report your answer to 2…