Calculate the energy required to heat 406.0mg of cyclohexane from 33.5°c to 38.9°c . assume the specific heat capacity of cyclohexane under these conditions is 1.85·j·g−1k−1 . be sure your answer has the correct number of significant digits.

The heat needed to warm 406.0 mg of cyclohexane from 33.5°C to 38.9°C is 209.22 Joules

Explanation:

Where:

Q = heat absorbed or heat lost

c = specific heat of substance

m = Mass of the substance  

ΔT = change in temperature of the substance

We have mass of cyclohexane = m = 406.0 mg = 0.4060 g

( 1 mg =0.001 g)

Specific heat of cyclohexane  = c = 1.85 J/g°CK

ΔT = 38.9°C - 33.5°C = 5.4°C =5.4+273.15 K = 278.55 K

Heat absorbed by the cyclohexane :

The heat needed to warm 406.0 mg of cyclohexane from 33.5°C to 38.9°C is 209.22 Joules

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

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