Phase Changes - Physical Chemistry
Card 0 of 1
Question
What amount of heat must be added to a 20-gram sample of ice in order to raise the temperature from 
to 
?
What amount of heat must be added to a 20-gram sample of ice in order to raise the temperature from
Answer
This question requires three steps:
1. We need to raise the temperature of the ice from 
to 
degrees Celsius.
2. We need to melt the ice.
3. We need to raise the temperature of the water from 
to 
degrees Celsius.
Steps one and three can use the equation:
Step 2 requires the enthalpy of fusion to be multiplied by the mass of the water sample.
Finding these three added heats will give us the total amount of heat needed to raise the temperature from 
to 
.
This question requires three steps:
1. We need to raise the temperature of the ice from
2. We need to melt the ice.
3. We need to raise the temperature of the water from
Steps one and three can use the equation:
Step 2 requires the enthalpy of fusion to be multiplied by the mass of the water sample.
Finding these three added heats will give us the total amount of heat needed to raise the temperature from
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