Chemistry Homework Help

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94 solutions

Heating and Cooling Curves

#### Q. Energy of phase changes and to raise temperature within a phase

Solved • Feb 27, 2020

Heating and Cooling Curves

#### Q. Given the following: heat of fusion of ice= 80.0 cal/g; Specific heat of ice = 0.480 cal/g; and Specific heat of water = 1.00 cal/g. Calculate the amount of heat required to melt 30.0g of ice at 0C.

Solved • Feb 23, 2020

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