Anybody who opted for physics kindly guides me.

while going through the syllabus they just give specific topics like perfect gas(ideal gas).(in thermodynamics section)
and when I study from helidey's book of physics; the ideal gas topic contains many sub topics like: Work Done by an Ideal Gas at Constant Temperature, Work Done at Constant Volume and at Constant Pressure, translational kinetic energy , root mean square, The Molar Specific Heats of an Ideal Gas, Degrees of Freedom and Molar Specific Heats etc. every sub topic has its own derivation.

my question is should i just prepare the ideal gas (in general way) or prepare every topic of ideal gas? if i go through every topic then it would take much much time.

so kindly help me in this regard.