Consider the proposed design for a steam power plant. The water is boiled and vapor is used to spin the turbine. From the turbine, the vapor is sent directly to the pump driven by the same turbine, and back to the boiler. It is claimed that considering some heat losses and friction losses, the efficiency of this device may approach 80%. Required:
a. Is any law of thermodynamics is violated? If so, which one, and why?
b. How would you this system to avoid the violation?

Which is a characteristic of mixtures?

What are the percent by mass of copper in penny lab

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.