The energy that is required to change the state of ice into a liquid is obtained in the form of heat energy from the ambient temperature of the warm room.
Once this heat energy is absorbed, the individual molecules of ice gain kinetic energy and start vibrating faster.
Yet, the temperature of the ice remains constant until the ice reaches its melting point because this energy is first utilised to break all the bonds of the lattice structure of the ice.
After all the bonds are broken and all of the ice has changed into water, if more heat is provided again, then the temperature of the water will increase.
The solution for this problem is: Let x denote the specific rotation, R; andLet y denote the specific rotation, S = -x Solution:60 x - 40 x/100 = - 43 20x = - 4300Divide both sides by 20The answer is:x = - 215 is the specific rotation of the pure r isomer.
