Phase Change Worksheet:
Specific Heat of water is 1.00 cal/g ºC
Specific Heat of ice is 0.500 cal/g ºC
Specific Heat of steam is 0.5 cal/g ºC
Heat of vaporization for water is 540 cal/g
Heat of fusion for of ice is 80 cal/g
1. Calculate the amount of heat removed when 5.0 x 102 mL of water at 18 ºC are converted into ice cubes at 15 ºC.
2. How much energy is needed to change a 25.0 g ice cube at -10.0 °C to steam at 110.0°C?
3. Suppose that you are camping in the winter. You have 30g of ice at 0 °C that you need to melt and heat
up so that you’ll have some warm drinking water (40 °C).
a. Make a phase change diagram to indicate the changes water will undergo in this problem & label
each step.
b. How much total heat is needed to do the problem above?
c. Convert heat from calories to Joules – 1 cal = 4.184 J
4. A sample of water with a mass of 23.0 grams at a temperature of -46.0°C increases to 40°C.
How much total heat is needed to do the problem above?