Only do question 4-6 show all work CHM 107, Quiz 1 Name How much energy must...
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 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 7.5 pts How much energy must be removed from a 22.2 g sample of benzene CH) at 85.0°C to solidify the sample and lower the temperature to -7.5°C? The following physical data may be useful. AHvap = 33.9 kJ/mol AHfus = 9.8 kJ/mol Cliquid - 1.73J/gºC Cgas = 1.06 J/g°C Csolid - 1.51 J/g°C Tmelting = 6,0 °C Tboiling = 80.0°C 29.4 kJ 15.8 kJ O 17.6 kJ O 70.2 kJ 10.5 kJ
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
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 is needed to vaporize 230.0 g of liquid benzene (C6H6) at its boiling point? The molar heat of vaporization of benzene is 33.83 kJ/mol.
Chemistry Please show complete work for the question 2.CALORIMETRY a) How many kiloJoules of energy are needed to raise the temperature of 1.50dm of water from 20.0°C to 47.0°c? b) The specific heats of three different liquid substances are listed as Carbon tetrachloride: 0.856 J/g'C Benzene: 1.74 J/g'C Acetic Acid: 2.05 An experimenter found that 1.42 kJ of heat energy raised the temperature of 19.70g of an unknown liquid substance by 36.4°C. What substance could this be? (Show all work)...
At 1 atm, how much energy is required to heat 0.0550 kg of ice at -22.0 °C to steam at 129.0 °C? STRATEGY 1. Calculate the energy needed for each temperature change or phase change individually. A. The energy needed to heat 0.0550 kg of ice from -22.0 C to its melting point. B. The energy needed to melt 0.0550 kg of ice at its melting point C. The energy needed to heat 0.0550 kg of liquid water from the...
rams of ethanol (C2HSOH) from-120.0 C to 85.0 4. How much energy is needed to convert 25.0 g °C? 25 points molar heat capacity (solid) = 1 1 1 .46 J/mol*K molar heat capacity(liquid) 112.4 J/mol*K molar heat capacity(gas)- 78.28 J/mol*K heat of fusion 4.9 KJ/mol heat of vaporization = 38.56 KJ/mol melting point--114.1 C boiling point-783 C