IP A 1.2-kg block of ice is initially at a temperature of -4.0 C. Part A If 2.7×

Question

IP A 1.2-kg block of ice is initially at a temperature of -4.0 C.

Part A

If 2.7×105 J of heat are added to the ice, what is the final temperature of the system?

Express your answer using one significant figure.

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Part B

Find the amount of ice, if any, that remains.

Express your answser using one significant figure.

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IP A 1.2-kg block of ice is initially at a temperature of -4.0 C.

Part A

If 2.7×105 J of heat are added to the ice, what is the final temperature of the system?

Express your answer using one significant figure.

T =   C  

SubmitMy AnswersGive Up

Part B

Find the amount of ice, if any, that remains.

Express your answser using one significant figure.

mice =   kg  

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Explanation / Answer

a)

Heat necessary to raise the ice to the melting poont

Q1=mcicedT=1.2*2090*(0-(-4))=10032 J

So heat left

Q= 270000 - 10032 = 259,968 J

Heat necessary to melt the ice
Q = mLf = 1.2*335000 = 402,000 J

since heat left is less than heat necessary to melt the ice .Therefore  some ice will left and some water will left at 00C

Tf=0oC

b)

mass of ice melted

259968 = m*335000

m=0.776 kg

mass of ice remain

m= 1.2 - 0.776 = 0.424 kg

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