An adiabatic turbine operates with methane as the working fluid. the flow rate of the methane is 1000 g/s. at the inlet of the turbine the pressure is 97 bar and the temperature is 495°k. at the exit, the pressure is 94 bar and the temperature is 190°k. the residual enthalpies hy; and hez are -61.64r and -729r respectively. what is the enthalpy change? (6 marks] what is the net power delivered by the turbine? [6 marks)
data: c, = 2.84 kj/kg. k
b. a geothermal power plant uses geothermal water extracted at 160°c at a rate of 440 kg/s as its heat source. it produces 22.0 mw of net power. if the environmental temperature is 25 °c, determine:
the thermal efficiency [4 marks)
the maximum possible thermal efficiency [4 marks)
the actual heat rejection from the plant. (4 marks)
data: hsource = 675.47 kj/k and hsrink = 104.83 kj/k

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.