Chemistry, 23.10.2020 17:20 alexwlodko

The specific heat capacity of water is 4.18 J/(g•°C). When 200 grams of water cools from 50.°C to 25°C, the total amount of heat energy released by the water is

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Answer from: AriesTwice

The total amount of heat energy released by the water is 20,900 J

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

The sensible heat of a body is the amount of heat received or transferred by a body when it undergoes a temperature variation without there being a change in physical state (solid, liquid or gaseous). Its mathematical expression is:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature.

In this case:

Q=?c= 4.18 $\frac{J}{g*C}$ m= 200 gΔT= Tfinal - Tinitial= 50°C - 25°C= 25°C

Replacing:

Q= 4.18 $\frac{J}{g*C}$ *200 g* 25°C

Solving:

Q=20,900 J

The total amount of heat energy released by the water is 20,900 J

Answer from: Quest

im pretty sure its b

Answer from: Quest

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).

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The specific heat capacity of water is 4.18 J/(g•°C). When 200 grams of water cools from 50.°C to 25...

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