Question

What is used to measure the calorific value of a substance?
A). Barometer
B). bomb
C). Spectrometer
D). Combustion chamber

Answer 1

Hint :The heating value of a substance, usually a fuel or food, is the amount of warmth released during the combustion of a specified amount of it. The calorific value is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard conditions.

Complete Step By Step Answer:
Barometer: to live pressure.
Bomb calorimeter: to live the warmth output of combustion.
Spectrometer: to live the absorption of sunshine .
Combustion chamber: Chamber used for combustion.
bomb calorimeter Measurement. an apparatus which will measure heats of combustion, utilized in various applications like calculating the calorific value of foods and fuels.
The calorific value via the Oxygen bomb is measured by the warmth obtained from the sample, compared with the warmth obtained from combustion of a reference material like carboxylic acid . A known amount of sample is burnt during a high oxygen atmosphere within a vessel or “bomb”.
Bomb calorimeters are devices wont to determine the warmth of combustion of a reaction . The knowledge gathered from a bomb during a reaction tells scientists whether certain products are safe to be used and therefore the quality level of every product being tested.
Hence: the choice B is correct.

Note :
A calorimeter may be a device wont to measure the quantity of warmth involved during a chemical or physical process. For instance , when a chemical reaction occurs in solution during a calorimeter, the warmth produced by the reaction is absorbed by the answer , which increases its temperature.