a) Explain enthalpy of fusion.
b) Give illustration of fusion of ice.

Double fertilization is fusion of

Given below are 3 gametes a , b and c. a and b gametes undergoes fusion. a)identify the fusion. b) Give the explanation for the identification.

For the melting of ice at '25^circ C' : 'H_2 O(s) rarr H_2 O(l)' the enthalpy of fusion is '6.97 kJmol^(-1)', and entropy of fusion is '25.4 J mol^(-1) K^(-1)'. Calculate the free energy change and predict whether melting of ice is spontaneous or not at this temperature.

What is triple fusion?

a) What do you meant by enthalpy of vapourisation? b) Explain enthalpy of sublimation.

Double fertilization and triple fusion are the two terms associated with angiosperm fertilization. Explain triple fusion. Give the ploidy level of (i) endosperm (ii) zygote