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# Thermofluids help needed!!

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1. Hey guys! so ive been on abeyance this year and now i have to do my exams i need help with this question because ive been away not sure what i have to revise on heres a question from a past paper, could yall help me out with the question and what the topic is so i can look it up online!! thanks so much!!
2. heres the copy and paste:

A1. (a) A mixture of three gases has the following percentage analysis by
mass:
CO2 35% N2 25% O2 40%
The mixture occupies a volume of 0.5 m3
at a temperature of 77 oC and
a pressure of 4 bar.
Calculate:
(i) the analysis by volume [30 %]
(ii) the gas constant and the molecular mass of the mixture
[10 %]
(iii) the mass and the specific heat capacity at constant
volume of the mixture
[10 %]
(iv) the partial pressure of each gas [15%]
(b) The mixture undergoes a process according to PV1.25 = Constant
to a temperature of 25 oC.
Calculate:
(i) The work done during this process [20%]
(ii) The heat transferred during this process [15%]
Relative Mole
3. heres the screenshot as attached:
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