Question

Explain bomb calorimeter to determine calorific value of solid fuel wikipedia

Answer 1

Answer:

Explanation:

A calorimeter is an object used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity. Differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters and accelerated rate calorimeters are among the most common types. A simple calorimeter just consists of a thermometer attached to a metal container full of water suspended above a combustion chamber. It is one of the measurement devices used in the study of thermodynamics, chemistry, and biochemistry.

To find the enthalpy change per mole of a substance A in a reaction between two substances A and B, the substances are separately added to a calorimeter and the initial and final temperatures (before the reaction has started and after it has finished) are noted. Multiplying the temperature change by the mass and specific heat capacities of the substances gives a value for the energy given off or absorbed during the reaction. Dividing the energy change by how many moles of A were present gives its enthalpy change of reaction.

{\displaystyle q=C_{v}(T_{f}-T_{i})} {\displaystyle q=C_{v}(T_{f}-T_{i})}

Where q is the amount of heat according to the change in temperature measured in joules and Cv is the heat capacity of the calorimeter which is a value associated with each individual apparatus in units of energy per temperature (Joules/Kelvin).

Answer 2

Answer:

Calorimetry is the field of science that deals with the measurement of the state of a body with respect to the thermal aspects in order to examine its physical and chemical changes. In this topic, we will teach about bomb calorimeter, its definition, uses and equation.

Explanation:

• Calorific Value Definition: The calorific value of a fuel is the quantity of heat liberated by its full combustion. Calorific value is stated in kJ/kg for solid and liquid fuels, and kJ/m3 for gaseous fuels, where m3 is normal cubic metre measured at NTP circumstances. The calorific value of gaseous fuels is sometimes stated as kJ per cubic metre under STP conditions.
• A bomb calorimeter is a calorimeter that is used to precisely estimate the energy change during a reaction. The current Bomb calorimeter evolved from Berthelot's initial calorimeter. The current bomb calorimeter is built of corrosion-resistant steel, and the combination Bomb Calorimeter is used.
• The bomb calorimeter is a device that measures the heat of reaction at a set volume and the measured heat, which is known as the change of internal energy (E). In chemistry, the heat changes of a reaction can be determined at a constant pressure or volume.

Observation Table:

1. Weight of empty crucible — W1gm
2. Weight of crucible + fuel — W2gm
3. Weight of the fuel taken — (W2-W1)gm
4. Weight of water in the bomb — 10 gm (generally)
5. Weight of water after test — 10 + x gm
6. Weight of moisture condensed — x gm
7. Weight of water in the calorimeter — mw gm
8. Weight of water equivalent of calorimeter — me gm
9. Weight of fuse wire — mfw gm
10. Calorific value of fuse-wire — (C.V.)FW
11. Weight of crucible + ash
12. Weight of ash — W4 = W3 – W1 gm
13. Weight of ash.
14. Observed temperature rise during main period — Δt = (Tn – T0)

Calculations for Calorific Value of Fuel:

1. Total heat liberated = Total heat absorbed
2. Heat released by fuel + Heat released by fuse wire + Heat released by cotton thread = Total heat absorbed by (Water + Bomb + Calorimeter)

Reference Link

• https://brainly.in/question/40861383
• https://brainly.in/question/32727749