Q3) a) The following information is given for water, H2O, at 1atm: boiling point = 100 °C Hvap(100 °C) = 40.7 kJ/mol specific heat liquid = 4.18 J/g°C At a pressure of 1 atm,______ kJ of heat are needed to vaporize a 47.5 g sample of liquid water at its normal boiling point of 100 °C. b)The following information is given for ethanol, C2H5OH, at 1atm: boiling point = 78.4 °C Hvap(78.4 °C) = 38.6 kJ/mol specific heat liquid = 2.46 J/g°C At a pressure of 1 atm, what is H in kJ for the process of condensing a 25.5 g sample of gaseous ethanol at its normal boiling point of 78.4 °C. ________kJ c)The following information is given for n-pentane, C5H12, at 1atm: boiling point = 36.2 °C Hvap(36.2 °C) = 25.8 kJ/mol specific heat liquid = 2.28 J/g°C At a pressure of 1 atm,_______ kJ of heat are needed to vaporize a 31.3 g sample of liquid n-pentane at its normal boiling point of 36.2 °C.

Based on the thermodynamic properties provided for water, determine the amount of energy released for 130.0  g of water to go from 89.0 °C to -12.0 °C.  Property Value Units Melting point 0.0 °C Boiling point 100.0 °C ΔHfus 6.01 kJ/mol ΔHvap 40.67 kJ/mol cp (s) 37.1 J/mol · °C cp (l) 75.3 J/mol · °C cp (g) 33.6 J/mol · °C

1. How much heat (in kJ) is required to convert 423 g of liquid H2O at 24.8°C into steam at 147°C? (Assume that the specific heat of liquid water is 4.184 J/g·°C, the specific heat of steam is 2.078 J/g·°C, and that both values are constant over the given temperature ranges. The normal boiling point of H2O is 100.0°C.)   kJ   2. Carbon tetrachloride, CCl4, was once used as a dry cleaning solvent, but is no longer used because it is carcinogenic. At 59.2°C, the vapor pressure of CCl4 is 58.9 kPa, and its enthalpy of vaporization is 29.82 kJ/mol. Use this information to estimate the normal boiling point (in °C) for CCl4.   °C

How much heat is released at constant pressure if a 15.0-L tank containing 47.0 atm of hydrogen sulfide gas condenses at its boiling point of -60.0°C? The enthalpy of vaporization of hydrogen sulfide is 18.7 kJ/mol at -60.0°C. (R= 0.0821 L• atm/(K • mol)) O 7.54 x 10° J O 2.68 x 10° J O 1.87x 10* J O 4.64x 10² J O 1.31 x 10² J