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Question 3 7.5 pts How much energy must be removed from a 22.2 g sample of...
How much energy must be removed from a 94.4 g sample of benzene (molar mass= 78.11 g/mol) at 322.0 K to solidify the sample and lower the temperature to 205.0 K? The following physical data may be useful. ΔHvap = 33.9 kJ/mol ΔHfus = 9.8 kJ/mol Cliq = 1.73 J/g°C Cgas = 1.06 J/g°C Csol = 1.51 J/g°C Tmelting = 279.0 K Tboiling = 353.0 K
You have a 10.0 g sample of water at 373 K. How much energy must you use to turn this into steam? AHvap = 40.7 kJ/mol AHfus = 6.02 kJ/mol Cliq - 4.184 J/g °C Cgas = 2.01 J/gºC Csol - 2.09 J/g°C Tmelting = 273.0 K Tboiling = 373.0 K 45346 3472.72 J 22598.63 -4534.6
How much energy is required to heat 36.0 g H2O from a liquid at 65°C to a gas at 115°C? The following physical data may be useful. ΔHvap = 40.7 kJ/mol Cliq = 4.18 J/g°/sup>C Cgas = 2.01 J/g°/sup>C Csol = 2.09 J/g°/sup>C Tmelting = 0°/sup>C Tboiling = 100°/sup>C
5) How much more heat is required to vaporize 48.7 g of ethanol (C,H,OH) than to vaporize 48.7 g of dichloromethane (CH2Cl2) ethanol dichloromethane AHvap is 40.5 kJ/mol AHvap is 31.6 kJ/mol AHfus is 5.02 kJ/mol AHfus is 6.20 kJ/mol Cs=2.46 J/gºC Cs= 1.19 J/g°C
Only do question 4-6 show all work
CHM 107, Quiz 1 Name How much energy must be removed from a 125 g sample of benzene (CH6 vapor at 425.0 K to make it a solid at 200.0 K? Use the following steps to get to your answer. You MUST show your work to receive any credit. The following physical data for benzene may be useful. See announcement for due date. AHvap 33.9 kJ/mol Cliq 1.73 J/g C Cgas 1.06 Csol...
Calculate the energy involved (in kJ) when 27.6 g ethanol (CH3CH2OH) goes from 106.5°C to -162.1°C. (Be sure to include the sign.) Ethanol boils at 78.37°C and freezes at -114°C with ΔHvap = 38.56 kJ/mol and ΔHfus = 4.9 kJ/mol; cliquid= 2.440 J/g°C, cgas = 1.699 J/g°C and csolid = 2.419 J/g°C.
How much energy is required to heat 87.1 g acetone (molar mass=58.08 g/mol) from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful. ΔHfus = 7.27 kJ/mol Cliq = 2.16 J/g°C Cgas = 1.29 J/g°C Csol = 1.65 J/g°C Tmelting = -95.0°C
How much energy must be removed from a 125 g sample of benzene (molar mass= 78.11 g/mol) at 425.0 K to liquify the sample and lower the temperature to 335.0 K? The following physical data may be useful. ?Hvap = 33.9 kJ/mol ?Hfus = 9.8 kJ/mol Cliq = 1.73 J/g
QUESTION 3 How much heat (in kJ) is required to raise the temperature of 122 g of ethanol (mw 46.07) from 11.29 °C to its boiling point of 78.37 °C and then vaporize it completely creating ethanol gas at the boiling temperature? (specific heat - 2.46 J/g°C, AHyap = 48.6 kJ/mol) QUESTION 4 What is the change in enthalpy (in kJ) when 40.1 g of ethanol (mw-46.07) is condensed at its boiling temperature? (specific heat 2.46 J/g°C, AHvap 48.6 kJ/mol)...
10. How much energy must be added to 2800 g of gold at its melting point of 1063 deg. C in order to change it from a solid to a liquid at 1121.0 deg. C? Answer: Last Answer: 1.7676E+05 J Not yet correct, tries 3/20 I NEED THE UNITS TO BE CORRECT PLEASE. THEY'RE BEING USED ON CAPA. ALSO SHOW ALL WORK. THANKS. Thermal Properties of Some Materials Material alpha beta csolid Tmelt Lfusion cliquid Tboil Lvaporize cgas k K-1 K-1...