CSM1037 Science for Energy Engineering 2. (a) Arrange the following in order of mass: (i) 0.1 moles of PbS (ii) 20 moles of MnCO3 (2 marks) (iii) 0.5 moles of FeS2 (2 marks) (iv) 2 moles of Ar (2 marks) (2 marks) (b) The electronic configuration or the symbol of 4 elements is shown below: (i) Ca (atomic number 20) (ii) 1s22s22p63s23p64s23d104p65s24d105p2 (1 marks) (iii) Cd (atomic number 48) (1 marks) (iv) 1s22s22p63s23p6 (1 marks) List the corresponding elements for each electronic configuration (1 marks) and vice-versa (c) Calculate H for the following reaction: (7 marks) ZnS+2O2Zn2++SO42 Given the following Hf data: ZnSZn2+O2SO42202.9kJ/mol152.4kJ/mol0kJ/mol907.5kJ/mol (d) Calculate G for the following reaction: (6 marks) CaO+H2OCa(OH)2 Given the following: H=65.3kJ/K/mol S=26.3J/K/mol T=298K Based on G, is the reaction as written likely to be spontaneous? Are the products more stable than the reactants