a) Two tanks are connected by a valve. One tank contains 2 kg of CO2 at 400K and 70 kPa. The other tank holds 8 kg of CO

[answerhappygod]

a) Two tanks are connected by a valve. One tank contains 2 kg of
CO2 at 400K and 70 kPa. The other tank holds 8 kg of CO2 at 250K
and 120 kPa. The valve is opened and the gasses are allowed to mix
while receiving heat from the surroundings. The final equilibrium
temperature is 310K. Assuming constant specific heats,
calculate:
i. The final equilibrium pressure [4 marks]
ii. Heat transfer for the process. [4 marks]
b) Complete the cells in the following table of properties of
water. In the last column describe the condition of water as
compressed liquid, saturated mixture or superheated vapour. If it
is a saturated mixture, give the quality as well.
𝑇 (𝑜𝐶)
𝑃 (𝑘𝑃𝑎)
ℎ (𝑘𝐽
𝑘𝑔)
𝑠 ( 𝑘𝐽
𝑘𝑔 𝐾)
Condition and
quality, if
applicable
160
Saturated Vapour
350
2000
110
200
125
100
[12 marks]