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57 solutions

Heating and Cooling Curves

Q. Using the provided data, calculate the amount of heat, in kJ, that must be removed to cool 19.1 g of gaseous methanol, initially at 76. °C, to solid methanol at -119. °C. methanol molar mass 32.0419 g/mol melting point -97. °C boiling point 65. °C ΔHfus 2.2 kJ/mol ΔHvap at bp 35.2 kJ/mol Cs, solid 3.28 J/g⋅°C Cs, liquid 2.53 J/g⋅°C Cs, gas 1.5 J/g⋅°C

Solved • Dec 11, 2019

Heating and Cooling Curves

Q. Using the provided data, calculate the amount of heat, in kJ, required to warm 20.1 g of solid water, initially at -10. °C, to gaseous water at 129. °C. water molar mass 18.0153 g/mol melting point 0. °C boiling point 100. °C ΔHfus 6.02 kJ/mol ΔHvap at bp 40.7 kJ/mol Cs, solid 2.09 J/g⋅°C Cs, liquid 4.18 J/g⋅°C Cs, gas 1.87 J/g⋅°C

Solved • Dec 10, 2019

Heating and Cooling Curves

Q. Determine how much energy is required to vaporize 35.0 g of C2Cl3F3(l) at 47.6 °C. ΔHvap C2Cl3F3 = 27.49 kJ/mol. Molar mass of C2Cl3F3 = 189.37 g.

Solved • Dec 7, 2019

Heating and Cooling Curves

Q. How much ice in grams would have to melt to lower the temperature of 350 mL of water from 40C to 0C? ? (Assume that the density of water is 1.0g/ml

Solved • Dec 4, 2019

Heating and Cooling Curves

Q. Based on the following thermodynamic data, calculate the boiling point of ethanol in degrees Celsius.

Solved • Dec 1, 2019