# Chemistry

posted by .

Calculate the enthalpy change when 100. g of ice at 0.0 °C is heated to liquid water at 50.0°C. (The heat of fusion for water is 333 J/g.)

1)54.2 kJ
2)33.3 kJ
3)54,220 kJ
4)20.9 kJ

• Chemistry -

1)54.2 kJ
2)33.3 kJ
3)54,220 kJ
4)20.9 kJ

Those are possible answers... Which is it?

• Chemistry -

q1 = heat to melt the ice.
q1 = mass of ice x heat of fusion.

q2 = heat to raise the temperature from 0 degrees C to 50 degrees C.
q2 = mass of water x specific heat water x (Tf - Ti)
Tf is final Temperature.
Ti is initial T.
Total heat = q1 + q2.
Post your work if you get stuck.

• Chemistry -

Never mind, I got it:

100 grams of ice times 333 J/g = 33.3 kJ of heat to melt all the ice.

Next, raising temperature of liquid, so 100 g *4.184 J/g *50= 20.92 kJ

• Chemistry -

right. In fact, I obtained 54.2 kJ.

## Similar Questions

1. ### chemistry

Calculate the enthalpy change when 50. g of ice at -30.0 °C is heated to completely melt to liquid water at 0.0°C. (The heat of fusion for water is 333 J/g.)
2. ### Chemistry

How much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C?
3. ### chemistry

Which of the following constants are needed to calculate the change in enthalpy (H) for heating a sample of liquid water at 10C to steam at 150C. I) the heat capacity of water II) the enthalpy of fusion of water III) the heat capacity …
4. ### chemistry

the enthalpy of fusion of ice is 6.02 kJ/mol. the heat capacity of liquid water is 75.4 J/molC. What is the smallest number of ice cubes at 0 degrees C each containing one mole of water, necessary to cool 500g of liquid water initially …
5. ### chemistry

Calculate the energy in the form of heat, in kJ, required to convert 225 grams of liquid water at 21.0 °C to steam at 115 °C. Heat of fusion = 0.333 kJ/g; heat of vaporization = 2.26 kJ/g; specific heat capacities: liquid water = …
6. ### Chemistry HEAT OF FUSION

What is the final temperature, in oC, after a 15.0 g piece of ice, at 0oC, is placed in a styrofoam cup with 128 g of water initially at 74.0oC. Assume there is no transfer of heat to or from the surroundings. The specific heat of …
7. ### Chemistry

Calculate the enthalpy change when 45 g of ice at -40.0 oC is heated to completely melt to liquid water at 0.0oC. (The heat of fusion for water is 333 J/g.)
8. ### chemistry

when one gram of water solidifies to ice 333.33 j of heat is evolved. calculate enthalpy of fusion of ice?
9. ### chemistry

1. Given that 50 grams of ice is heated at -20.0 °C to steam at 135.0 °C. i. Show the graph of the changes from ice to steam ii. Calculate the energy needed to change the ice to steam Please use these values: Heat of fusion = 334.16 …
10. ### chem

Calculate the enthalpy change for the conversion of 36.04 g of ice at -23.0 °C to water at 75.0 °C under a constant pressure of 1 atm. The specific heats of ice and water are 2.09 J/(°C . g ) and 4.18 J/(°C . g ) respectively. …

More Similar Questions