Sunday
April 19, 2015

Homework Help: physics

Posted by michael on Saturday, March 27, 2010 at 4:54am.

Entropy of melting
A block of a certain substance (m = 0.3 kg) sits in a cold room at its melting point 170 K. A lab demonstrator supplies heat at a rate of 200 W for 140 seconds by focusing light on the block to (just) completely melt the block.
(a) What is the latent heat of fusion of the substance?

(b)What is the change in entropy of the block due to the melting process?

Cheers

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - Say you have two substances, A and B. A has a melting point of 300 ...
Entropy - Tungsten has been used to make light bulb filaments since 1908. The ...
chemistry - this is what my lab report looks like (minus the graph of the first ...
physics - Suppose an unknown substance has a melting temperature of 1,200 ...
SCIENCE QUESTION - LEAD IS A SOFT, DENSE METAL WITH A SPECIFIC HEAT OF 0.028KCAL...
organic chem/ melting pt lab - why does a soluble impurity reduce the melting ...
Chemistry - Posted by ann on Sunday, October 17, 2010 at 4:26am. In melting ...
Chemistry - In melting point determination, why shouldn't a substance be re-...
Astronomy - The latent heat of melting is the amount of energy needed to convert...
chemistry - Tungsten has been used to make light bulb filaments since 1908. The ...

Members