How much heat is required to convert 422 g of liquid h2o at 23.5 °c into steam at 150 °c?

The heat that is required to convert 422 g of liquid H₂O at 23.5 °c into steam at 150 °c can be calculated as follows:

The heat capacity of water = 4184 J K⁻¹ C⁻¹

Therefore, heat required to warm the water from

23.5 °C to 100.0 °C.

                         =

Here,

m=0.422 kg

c=4184 J K⁻¹ C⁻¹

=100-23.5

   so, heat required to warm the water from  23.5 °C to 100.0 °C

                 = 0.422 × 4184 × (100-23.5)

                        = 135072.072 J

Latent heat of vaporization of water is 2260 kJ/kg

Thus the heat will be 0.422 × 2260000 = 953720 J

Heat required to raise steam from 100 to 150 

   2000 × 0.422 ×50 = 42200 J

Thus the heat required is (135072.072 + 953720 + 42200) = 1330992.07 Joules

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).