GENERAL KNOWLEDGE

GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following laws is accounted for when a closed calorimeter is used in an experiment to determine the amount of heat transferred?
A
Law of Entropy
B
Zeroth Law of Thermodynamics
C
Law of Conservation of Energy
D
All of the above.
Explanation: 

Detailed explanation-1: -Calorimeter Principle The principle of calorimetry indicates the law of conservation energy, i.e. the total heat lost by the hot body is equal to the total heat gained by the cold body.

Detailed explanation-2: -Hess’s law can be used to determine the overall energy required for a chemical reaction that can be divided into synthetic steps that are individually easier to characterize. This affords the compilation of standard enthalpies of formation, which may be used to predict the enthalpy change in complex syntheses.

Detailed explanation-3: -Calorimetry is based on the First Law of Thermodynamics that states that energy cannot be created nor destroyed. The heat of neutralization that is lost in the chemical reaction (the system) is gained by the calorimeter and its contents (the surroundings).

Detailed explanation-4: -Calorimetry. Calorimetery is an application of the First Law of Thermodynamics to heat transfer, and allows us to measure the enthalpies of reaction or the heat capacities of substances. From the first law we can state. EUniverse=ESystem+ESurrounding=0.

There is 1 question to complete.