Explore BrainMass
Share

Heat energy and water

This content was STOLEN from BrainMass.com - View the original, and get the solution, here!

I have the data but I am having a hard time determining the end result.

How much heat energy is required to raise the temp. of 5.0g of H20 from -10C to 110C ? (ice to steam)

Given the following data:
Specific Heat J/gK Molar Heat Capacity J/molK Formula Mass
Water (l) 4.184 75.3 18.0
Ice 2.05 36.9 18.0
Water Vapor 1.84 33.1 18.0

Fusion -- 6.01 kj/mol
Vaporization -- 40.67 kj/mol

© BrainMass Inc. brainmass.com September 23, 2018, 7:45 pm ad1c9bdddf - https://brainmass.com/chemistry/energetics-and-thermodynamics/heat-energy-water-43392

Solution Preview

This should be done in 5 steps.

Heat the ice to 0 C by:

q = mc(Tf-Ti)

q1 = 5.0 g(2.05 J/gK)(0-(-10))

q1 = 102.5 J

Melt the ice

q = n(Fusion)

n = m/MM

n = 5 g /18 ...

Solution Summary

This solution is provided in 181 words. It demonstrates through five steps, including heating, melting, heating again, boiling, and heating the steam, how much total heat energy is required.

$2.19