Wednesday

December 17, 2014

December 17, 2014

Posted by **Dina** on Thursday, February 4, 2010 at 7:15am.

1. Calculate the percentage of the empty space in a face-centered cubic lattice, and show that it does not depend on the edge length of the unit cell ot on the size of the atoms in the unit cell. It says I need to find the edge length in terms of the radii of the atoms in the unit cell, the total volumme of the unit cell in terms of the edge length, and filled the volume from the total volume of the atoms in the unit cell.

What equation will you use to calculate heat of fusion of ice? The specific heat of water is 4.184J/ (g x c) and the heat capacity of your calorimeter is 1.0 x 10^1 J/C. Explain the reasoning behind your equation.

- chemistry help! -
**bobpursley**, Thursday, February 4, 2010 at 9:30amThere are four atoms per cell.

Packing factor: volumeatoms/volumecell

= 4*4/3 PI r^3 / s^3

Now, on any face diagonal, one has to have 4r, so 4r= s*sqrt2

packing factor: 16/3 PI 1/64 * 2sqrt2

= 1/6 PI sqrt 2= you do it.

b. I have no idea what you did, but suspect you melted ice of some mass.

Heatabsorbed=Hfusion*mass

**Answer this Question**

**Related Questions**

chemistry - Hello, I am having problem with two lab questions and was wondering ...

Chemistry - Rank the crystal lattice structures in order of decreasing ...

Chemistry - CdO is cubic with a lattice constant a=4.695 A˚ and a density...

Chemistry - CdO is cubic with a lattice constant a=4.695 A˚ and a density...

Chemistry - The unit cell with all sides the same length and all angles equal to...

Chemistry - crystal structure of cesium chloride (CsCl). 1)Identify the crystal ...

science - The lanthanide metal europium (Eu) forms a crystalline solid with a ...

AP chem - Second question: In the LiCl structure shown in 9.18 [LiCl's lattice, ...

Chemistry - Silver crystallizes in a face centered cubic unit cell with an edge ...

chemistry - I have a unit cube question to which the answer is given that I'm ...