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Why bomb calorimeter is called by that name?
In conducting a calorimetric test using a bomb calorimeter, the substance or object to be studied is placed inside the combustion crucible and ignited. The resulting reaction usually occurs so quickly that it resembles the explosion of a bomb-hence, the name "bomb calorimeter."
Why does a calorimeter have a doubled- walled container?
so that the calorimeter can keep in the heat of the liquid in for an accurate measurment of the change in temperature.
How should a thermometers be positioned in the calorimeter lid?
The thermometer should be positioned in the center of the calorimeter lid, making sure it is not touching the sides or bottom of the calorimeter. This ensures an accurate measurement of the temperature changes happening inside the calorimeter during an experiment.
Why do you add radiation correction in joules calorimeter?
Radiation correction is added in joules calorimetry to account for any heat loss due to radiation from the calorimeter. This correction helps to ensure that the measured heat flow is accurate and that the calorimeter is properly insulated from external factors that could affect the experimental results.
Which alloy is used in making accurate laboratory balances?
The most common alloy used in making accurate laboratory balances is stainless steel. Stainless steel offers high precision and resistance to corrosion, making it an ideal material for maintaining accuracy in laboratory measurements.
How can you find the calorific value of coal?
Calorific Value of Coal can be determined by employing an apparatus called the Bomb Calorimeter. However, this instrument is expensive. Alernatively, you can send the sample to an INDEPENDENT laboratory who normally carry out the test for a certain fee. Less accurate measurements can be made using a thermometer, an insulated contained and a known amount of coal.
Why is air pumped through the chamber instead of just letting the fuel use the air in a calorimeter?
Pumping air through the chamber ensures a consistent supply of oxygen for the fuel to combust. This ensures more accurate and controlled combustion reactions, leading to more reliable measurements of the fuel's calorific value in the calorimeter. It also helps maintain proper temperature control within the system.
How accurate is a bomb calorimeter?
A bomb calorimeter is a highly accurate instrument for measuring the heat of combustion of a sample. It can provide precise and reliable data on the energy content of different materials, making it a valuable tool in various fields such as chemistry and food science.
Is a bomb calorimeter accurate?
Yes, a bomb calorimeter is known for its high accuracy in measuring heat of combustion for various substances. It can provide precise measurements by keeping the system isolated and accounting for all heat transfer mechanisms.
What are the Pros and cons of bomb calorimeter?
Pros: Accurate measurement of energy content in food or fuel samples, precise control over experimental conditions, and reliable results for calculating calorific values. Cons: Expensive equipment, time-consuming process to operate and analyze samples, and limited to measuring only the energy from combustion reactions.
Why bomb calorimeter is called by that name?
In conducting a calorimetric test using a bomb calorimeter, the substance or object to be studied is placed inside the combustion crucible and ignited. The resulting reaction usually occurs so quickly that it resembles the explosion of a bomb-hence, the name "bomb calorimeter."
Why high pressure oxygen is used in bomb calorimeter?
There are 2 reasons for using high pressure oxygen in bomb calorimeter. The 1st is that we need enough oxygen for a complete combustion in a very small volume. To do that the oxidant pressure must be high. The typical air ratios in a bomb calorimeter are between 4 and 9. The 2nd reason is that we want to measure the high calorific value of a fuel. Thus the water produced from the combustion must be in liquid form. For a certain temperature, the higher the vapor pressure, the higher the liquid water percentage. So, the higher the total pressure (25 atm), the higher the partial vapor pressure. jimmer
Why does a calorimeter have a doubled- walled container?
so that the calorimeter can keep in the heat of the liquid in for an accurate measurment of the change in temperature.
How should a thermometers be positioned in the calorimeter lid?
The thermometer should be positioned in the center of the calorimeter lid, making sure it is not touching the sides or bottom of the calorimeter. This ensures an accurate measurement of the temperature changes happening inside the calorimeter during an experiment.
What are the differences between simple calorimeter and bomb calorimeter?
A simple calorimeter measures heat changes in a substance through temperature changes in water surrounding it, while a bomb calorimeter measures the heat of combustion of a substance by igniting it in a sealed chamber under high pressure. Bomb calorimeters are more precise and accurate than simple calorimeters, but they are also more complex and expensive to operate.
In calculating the heat given off by a reaction in a calorimeter you must account for heat absorbed by?
In calculating the heat given off by a reaction in a calorimeter, you must account for heat absorbed by the surroundings, including the calorimeter itself, any water or solution in the calorimeter, and the air around the calorimeter that may be affected by the reaction. This ensures an accurate measurement of the heat released or absorbed by the reaction itself.
Why do you add radiation correction in joules calorimeter?
Radiation correction is added in joules calorimetry to account for any heat loss due to radiation from the calorimeter. This correction helps to ensure that the measured heat flow is accurate and that the calorimeter is properly insulated from external factors that could affect the experimental results.
