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78 solutions

Heating and Cooling Curves

Q. Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20°C to convert it to liquid water at 60.0°C. Specific heat (ice) = 2.1 J/g x °C Specific heat (water) = 4.18 J/ g x °C deltaH(fus) = 6.0 kJ/mol

Solved • Feb 19, 2020

Heating and Cooling Curves

Q. If 76 g of ice at 0.0 C is placed in 245 mL of water at 35 C, find the temperature if all of the ice melts. Specific heat of ice= 2.09 J/g C , Specefic of water = 4.184 J/ g C

Solved • Feb 7, 2020

Heating and Cooling Curves

Q. How much energy is needed to raise the temperature of H2O frim -17.8 to 106.2 Deg C

Solved • Feb 5, 2020

Heating and Cooling Curves

Q. The scenes below represent a phase change of water. Use values for molar heat capacities and heats of phase changes from the text discussion to find the heat (in kJ) released or absorbed when 2.25 mol of H2O undergoes this change.

Solved • Feb 5, 2020

Heating and Cooling Curves

Q. How much heat energy, in kilojoules, is required to convert 60.0 g of ice at −18.0 ∘C to water at 25.0 ∘C ?

Solved • Jan 17, 2018

Heating and Cooling Curves

Q. The heat of vaporization of water is 40.6 kJ/mol. How much heat energy is required to convert 1.00L of water to steam?

Solved • Feb 4, 2020

Heating and Cooling Curves

Q. What amount of heat (in kJ) is required to convert 20.6 g of an unknown solid (MM = 83.21 g/mol) at -5.00 °C to a liquid at 52.3 °C? (heat capacity of solid = 2.39 J/g・°C; heat capacity of liquid = 1.58 J/g・°C; ∆Hfus = 3.72 kJ/mol; Tf = 10.3°C)

Solved • Feb 4, 2020