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Heating and Cooling Curves

Q. From the data below. calculate the total heat [in J) needed to convert 30.00 g of ice at 4.25C to liquid water at 0.350C: m.p at 1 atm: 0.0C [d]Hofus:6.02kJ/mol c liquid: 4.184 j/g C c solid:2.09 j/g C

Solved • Jun 28, 2019

Heating and Cooling Curves

Q. How much heat in kJ, is required to convert 36.12 grams of water at 100°C to steam? (ΔHvap = 40.657 kJ/mol.)

Solved • Jun 24, 2019

Heating and Cooling Curves

Q. How much heat (in kJ) is required to convert 426 g of liquid H2O at 22.9°C into steam at 145°C? (Assume the specific heat of liquid water is 4.184 J/g°C, the specific heat of steam is 2.078 J/g°C, and both values are over the given temperature ranges. The normal boiling point of H2O is 100.00°C. )

Solved • Jun 24, 2019

Heating and Cooling Curves

Q. Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 0.550 kg of water decreased from 123 °C to 50.0 °C.

Solved • May 20, 2019

Heating and Cooling Curves

Q. How many grams of ethanol C2H5OH can be boiled with 803.2 KJ of heat energy? The molar heat of vaporization of ethanol is 38.6 KJ/mol

Solved • May 12, 2019

Heating and Cooling Curves

Q. Calculate the heat that is required to heat a piece of 20.0 g ice at –8.0 ˚C to water at 25 ˚C.

Solved • May 8, 2019

Heating and Cooling Curves

Q. a 24.21g sample H2O ice initially at -20°C is heated & converted into steam at 120°C. Calculate amount of heat required ∆H°vap=40.8kJ/mol, s(H2Ol)=4.18J/g•°C, s(H20s)=2.01J/g•°C, s(H2Og)=2.05J/g•°C

Solved • May 2, 2019