Energy Calculations Problem 21 (5 points) Calculate the amount ofEnergy needed t

Question

Energy Calculations Problem 21 (5 points) Calculate the amount ofEnergy needed to raise the temperature of 5s. grams of ce from a temperature of -45 C to a final temperature of 0 C. Answer calories. Problem 22 (5 points) calculate the amount of Energy needed to melt 55. grams of Ice. Note: The initial condition of the lce is 0 eCand the final condition of the water is 0 C. uss) (80 Answer (Hutoo calories LILIO CD Problem 23 (5 points) Calculate the amount of Energy needed to raise the temperature of 55. grams of Water from a temperature of 0 °C to a final temperature of 100 oc. Answer So calories 27 LOO March 13, 2017

Explanation / Answer

The energy released,Q= mcdt

Where

m= mass of ice=55 g

c= specific heat capacity of ice=0.5 J/goC

dt=change in temperature=0-(-45)=45 oC

Plug the values we get,Q=1237.5 Cal

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