In a monatomic crystalline solid each atom can occupy either a regular lattice site or an interstitial site. The energy of an atom at an interstitial site exceeds the energy of an atom at a lattice site by an amount ε. Assume that the numberof interstitial sites equals the number of lattice sites, and also equals the number of atoms N. Calculate the entropy of the crystal in the state where exactly n of the N atoms are at interstitial sites. What is the temperature of the crystal in this state, if the crystal is in thermal equilibrium? If ε = 1 eV and the temperature of the crystal is 300 K, what is the fraction of atoms at interstitial sites?

multiple

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.