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Gaurav Seth 7 years, 1 month ago
Hydrocarbons are the compound that contains carbon and hydrogen atom.
Saturated hydrocarbon: Saturated hydrocarbons are that contain only single bonds between carbon atoms.
General formula CnH2n+2
example methane, ethane etc.

unsaturated hydrocarbons that contain double or even triple bonds between the carbon atoms.
General formula of double bond hydrocarbon
CnH2n
For example ;Ethene, propene etc

General formula of triple bond hydrocarbon
CnH2n-2
Ethyne, propyne etc

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Gaurav Seth 7 years, 1 month ago
Rise in temperature, ΔT = 299-298 = 1 k
Heat capacity of calorimeter , Cv = 20.7 kJ/mol (given)
so, Heat absorbed by calorimeter = Cv × ΔT = 20.1 × 1= 20.1kJ
This is the heat evolved in combustion of 1g graphite
So, heat evolved in the combustion of 1 mole of graphite
i.e. 12 g of graphite = 20.7 × 12 = 284.4kJ
Since heat is evolved and vessel is closed
so, enthalpy change of the reaction = - 284.4kJ/ mol
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Yogita Ingle 7 years, 1 month ago
<nobr aria-hidden="true">C+ 4HNO3 ⟶ CO2 + 2H2O + 4NO2</nobr>
This reaction is a good indicator of the oxidising nature of concentrated nitric acid.
Posted by Chirag Kalra 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
When barium azide is heated , it will form barium and nitrogen .
Ba(N3)2 → Ba + 3N2

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