Question 1: How much energy is required to melt a 200g ice cube initially at -10

ID: 1308629 • Letter: Q

Question

Question 1:

How much energy is required to melt a 200g ice cube initially at -10C? Express your answer with the appropriate units. Q =? J

Question 2:

You place a tray containing 310g of water at 10?Cin your freezer.

Part A

How much energy must be removed to turn the water to ice at -18?C?

Express your answer to two significant figures and include the appropriate units.

You place a tray containing 310g of water at 10?Cin your freezer.

Part A

How much energy must be removed to turn the water to ice at -18?C?

Express your answer to two significant figures and include the appropriate units.

Q = ?J

The temp must be raised to 0oC before melting

So Q = m*c*?T + m*Lf

= 200g*2.09 J/g-oC*(11oC) = 200*334J/g = 7.14x10^4J = 71.4kJ

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