Ice And Calorimetry Lab Results

471 Words1 Page

Procedure
Put 300 grams of ice each into 4 different 1000mL beakers. Add 0 grams of salt into the first beaker. Add 30 grams of salt into the second beaker. Add 60 grams of salt into the third beaker. Add 90 grams of salt into the fourth beaker. Put a thermometer with starting temperature of 21°C into each beaker. Record the temperature every minute for 10 minutes. Repeat the trial 5 times.

Results
For all 5 trials with 300 grams of ice and 0 grams of ice, the lowest temperature is 0°C. For all trials with 300 grams of ice and 30 grams, 60 grams, or 90 grams of salt, the temperature dropped below 0°C within 10 minutes. The lowest recorded temperature was -14°C with 300 grams of ice and 90 grams of salt after 10 minutes. Putting a ziploc bag containing half and half into a solution containing 300 grams of ice and 90 …show more content…

The solutions with ice and salt were all able to drop to a temperature below 0°C within 10 minutes, while the ice solution never dropped below 0°C across all 5 trials. This indicate that salt is the variable that contributed to the decrease in temperature since the initial temperature of the thermometer, the amount of ice, and the room temperature, were all held constant.
Ice melts quickly when salt is added because salt decreases the melting point of ice. At room temperature the salt and ice solution will melt very quickly, since the room temperature is well above its freezing point. As the ice is melting, it is taking heat or energy from the surrounding because melting is an endothermic reaction. As heat get removed from the surrounding to melt the ice, the solution and the surrounding will get colder. This is what causes the temperature of salt and ice solution to be lower than 0°C.

Material list
1. Timer
2. Half and Half
3. Vanilla Extract
4. 1000mL Beaker
5.

Open Document