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24. How much heat is required to raise the temperature of 215 g CH3OH(1) from 20.0 to 30.0 °C and then vapor- ize it at 30.0 °C? Use data from Table 12.4 and a molar heat capacity of CH3OH(1) of 81.1 J mol¯K¯!. TABLE 12.4 Intermolecular Forces and Enthalpies of Vaporization at 298 Ka Boiling Point, °C AvapH, kJ mol-1 % Dipole a, 10-25 cm3 Liquid µ, Debye % Dispersion 18.5b 27.1 Dimethyl ether, (CH3),O Diethyl ether, (CH;CH,),O Methanol, CH,OH Ethanol, CH,CH,OH Water, H,O 1.30 52.9 84.6 15.4 -24.8° 96.3 1.10 102 3.7 34.5 37.4 42.3 1.70 32.9 54.1 47.6 42.4 64.6 1.69 69.8 30.2 78.3 1.85 14.5 13.8 86.2 44.0 100 a All data are from the CRC Handbook of Chemistry and Physics, 95th edition. bAvapH values are temperature and pressure dependent (see Exercise 93). The AvapH values for these substances at their respective normal boiling points are 21.5 kJ mol-1 for (CH,),0; 26.5 kJ mol-1 for (CH,CH,),O;35.2 kJ mol-1 for CH,OH; 38.6 kJ mol-1 for CH,CH,OH; and 40.7 kJ mol-1 for H,O. (These are the normal boiling points, measured at 1 atm.

24. How much heat is required to raise the temperature of 215 g CH3OH(1) from 20.0 to 30.0 °C and then vapor- ize it at 30.0 °C? Use data from Table 12.4 and a molar heat capacity of CH3OH(1) of 81.1 J mol¯K¯!. TABLE 12.4 Intermolecular Forces and Enthalpies of Vaporization at 298 Ka Boiling Point, °C AvapH, kJ mol-1 % Dipole a, 10-25 cm3 Liquid µ, Debye % Dispersion 18.5b 27.1 Dimethyl ether, (CH3),O Diethyl ether, (CH;CH,),O Methanol, CH,OH Ethanol, CH,CH,OH Water, H,O 1.30 52.9 84.6 15.4 -24.8° 96.3 1.10 102 3.7 34.5 37.4 42.3 1.70 32.9 54.1 47.6 42.4 64.6 1.69 69.8 30.2 78.3 1.85 14.5 13.8 86.2 44.0 100 a All data are from the CRC Handbook of Chemistry and Physics, 95th edition. bAvapH values are temperature and pressure dependent (see Exercise 93). The AvapH values for these substances at their respective normal boiling points are 21.5 kJ mol-1 for (CH,),0; 26.5 kJ mol-1 for (CH,CH,),O;35.2 kJ mol-1 for CH,OH; 38.6 kJ mol-1 for CH,CH,OH; and 40.7 kJ mol-1 for H,O. (These are the normal boiling points, measured at 1 atm.

Chemistry
Chemistry
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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
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24. How much heat is required to raise the temperature of 215 g CH3OH(1) from 20.0 to 30.0 °C and then vapor- ize it at 30.0 °C? Use data from Table 12.4 and a molar heat capacity of CH3OH(1) of 81.1 J mol¯K¯!.
Transcribed Image Text:24. How much heat is required to raise the temperature of 215 g CH3OH(1) from 20.0 to 30.0 °C and then vapor- ize it at 30.0 °C? Use data from Table 12.4 and a molar heat capacity of CH3OH(1) of 81.1 J mol¯K¯!.
TABLE 12.4 Intermolecular Forces and Enthalpies of Vaporization at 298 Ka Boiling Point, °C AvapH, kJ mol-1 % Dipole a, 10-25 cm3 Liquid µ, Debye % Dispersion 18.5b 27.1 Dimethyl ether, (CH3),O Diethyl ether, (CH;CH,),O Methanol, CH,OH Ethanol, CH,CH,OH Water, H,O 1.30 52.9 84.6 15.4 -24.8° 96.3 1.10 102 3.7 34.5 37.4 42.3 1.70 32.9 54.1 47.6 42.4 64.6 1.69 69.8 30.2 78.3 1.85 14.5 13.8 86.2 44.0 100 a All data are from the CRC Handbook of Chemistry and Physics, 95th edition. bAvapH values are temperature and pressure dependent (see Exercise 93). The AvapH values for these substances at their respective normal boiling points are 21.5 kJ mol-1 for (CH,),0; 26.5 kJ mol-1 for (CH,CH,),O;35.2 kJ mol-1 for CH,OH; 38.6 kJ mol-1 for CH,CH,OH; and 40.7 kJ mol-1 for H,O. (These are the normal boiling points, measured at 1 atm.
Transcribed Image Text:TABLE 12.4 Intermolecular Forces and Enthalpies of Vaporization at 298 Ka Boiling Point, °C AvapH, kJ mol-1 % Dipole a, 10-25 cm3 Liquid µ, Debye % Dispersion 18.5b 27.1 Dimethyl ether, (CH3),O Diethyl ether, (CH;CH,),O Methanol, CH,OH Ethanol, CH,CH,OH Water, H,O 1.30 52.9 84.6 15.4 -24.8° 96.3 1.10 102 3.7 34.5 37.4 42.3 1.70 32.9 54.1 47.6 42.4 64.6 1.69 69.8 30.2 78.3 1.85 14.5 13.8 86.2 44.0 100 a All data are from the CRC Handbook of Chemistry and Physics, 95th edition. bAvapH values are temperature and pressure dependent (see Exercise 93). The AvapH values for these substances at their respective normal boiling points are 21.5 kJ mol-1 for (CH,),0; 26.5 kJ mol-1 for (CH,CH,),O;35.2 kJ mol-1 for CH,OH; 38.6 kJ mol-1 for CH,CH,OH; and 40.7 kJ mol-1 for H,O. (These are the normal boiling points, measured at 1 atm.
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