Physics

posted by .

A 3.90×10^2kg cube of ice at an initial temperature of -18.0degreesC is placed in 0.480kg of water at 41.0degreesC in an insulated container of negligible mass.

Calculate the change in entropy of the system.

I found the equilibrium temperature to be at 304.9K, then used
change in S = mass*c*ln(T2/T1) where T2 is the final temperature and T1 is the initial temperature.
But my answer was wrong.

  • Physics -

    There are TWO initial temperatures. You can not use the equation you used, except for the cooling of the liquid water. When ice is melting (if that ever happens here), the temperature stays the same and the entropy gain is Qin/273K

    Are you sure you copied the numbers correctly? There is nearly 1000 times more ice than liquid water initially, according to the numbers you gave. If that is true, you would heat the ice but not melt any.

    Rethink the equilibrium temperature. Then calculate the entropy gain of the ice and subtract the entropy loss of the water.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. more physics.

    What change in entropy occurs when a 27.9-g ice cube at -12 C is transformed into steam at 115 C?
  2. Physics

    Inside an insulated container, a 250-g ice cube at 0°C is added to 200 g of water at 18°C. (i) What is the final temperature of the system?
  3. physics

    A 0.0400 kg ice cube at -30.0°C is placed in 0.400 kg of 35.0°C water in a very well insulated container. What is the final temperature?
  4. Physical Chemistry

    If a 30g piece of ice at -5C is immersed in 125mL of water at 25C in an insulated container... A. Determine the final temperature and final composition of the system B. Determine the entropy changes of the ice and the water and the …
  5. Physics

    A 0.0500 kg ice cube at -30.0◦C is placed in 0.400 kg of 35.0◦C water in a very well insulated container. What is the final temperature?
  6. Physics

    A 0.0500 kg ice cube at -30.0◦C is placed in 0.400 kg of 35.0◦C water in a very well insulated container. What is the final temperature?
  7. Physics

    A 0.0475 kg ice cube at −30.0°C is placed in 0.577 kg of 35.0°C water in a very well insulated container. The latent heat of fusion of water is 334 kJ/kg, the specific heat of ice is 2092 J/(kg · K), and the specific heat …
  8. physics

    A 37.0 g ice cube at -15.0 degreesC is placed in 224 g of water at 48.0 degreesC. Find the final temperature of the system when equilibrium is reached. Ignore the heat capacity of the container and assume this is in a calorimeter, …
  9. physics

    A 37.0 g ice cube at -15.0 degreesC is placed in 224 g of water at 48.0 degreesC. Find the final temperature of the system when equilibrium is reached. Ignore the heat capacity of the container and assume this is in a calorimeter, …
  10. Physics! HElp

    A <10.0+A> g ice cube at -15.0oC is placed in <125+B> g of water at 48.0oC. Find the final temperature of the system when equilibrium is reached. Ignore the heat capacity of the container and assume this is in a calorimeter, …

More Similar Questions