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

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

For a family dinner, jose’s mom baked a loaf of bread. during the meal, his grandmother commented, “this bread is so dense! ” what do you think his grandmother meant by the word dense? you have some ideas regarding density already, but this experiment will enrich your understanding of the relationship between mass, volume and the density of objects. when making measurements in this experiment we will be using si units, the international system of units. the purpose of using si units is to have the ability to communicate and compare data results with other experiments without having to make conversions. measurement symbol si unit length m meter mass kg kilogram volume l liters density kg/l kilograms per liter any calculations that are performed during this experiment will ultimately be reported in scientific notation. recall that scientific notation is extremely important when we have data that is extremely small or large. scientists rely on a standard form of communication to quickly make hypotheses and judgements based on data. what is the density of block a? a0kg/l what is the density of block b? a1kg/l what is the density of block c? a2kg/l what is the density of block d? a3kg/l what is the density of block e? a4kg/l which block is the densest? a5

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a. soft fossils b. mold fossils c. index fossils d. trace fossils