Benzene vapour at 580°c is cooled and converted to a liquid at 25°c in a continuous condenser. the condensate is drained into 1.75 m drums, each of which takes te minutes to fill. the boiling temperature of benzene is 80.1°c and the heat o evaporation is 30.765 kj mol1. the specific gravity of the liquid benzene is 0.879, the heat capacities of benzene can be calculated using the expressions (t is in degrees celsius): 5 liquid benzene: c 126.5x 10 +23.4x 10 t vapour benzene: c 74.06x 103 +32.95x 10s t-25.20x 10 t2 +77.57x 1012t3 the units for the cp values are kj mol k1 draw the hypothetical process path from vapour to liquid benzene under the conditions given. (a) 5 marks] calculate the specific enthalpies associated with each path in the diagram in (a) (b) [8 marks] calculate the flow rate of liquid benzene product in mol s1 (c) [3 marks] calculate the rate (kw) at which heat is transferred from the benzene in the condenser. (d)

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).