0
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
High pressure oxygen is used in bomb calorimeters to aid in the combustion process of the sample being tested. By increasing the oxygen pressure, the combustion reaction can occur more efficiently and completely, leading to more accurate measurements of the heat energy released by the sample.
Add your answer:
Earn +20 pts
What is oxygen bomb calorimeter?
An oxygen bomb calorimeter is a device used to measure the energy content of a sample by combusting it in a controlled environment and measuring the temperature change. The sample is sealed in a high-pressure vessel (the bomb) with oxygen, ignited, and the heat released is used to calculate the calorific value of the sample. This method is commonly used to determine the energy content of fuels and food.
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.
What is principle of working of bomb calorimeter?
A bomb calorimeter measures the heat of combustion of a substance by burning it inside a high-pressure vessel (bomb) filled with oxygen. The heat released during combustion is absorbed by water surrounding the bomb, which increases the temperature of the water. By measuring the temperature change and knowing the heat capacity of the calorimeter, the energy content of the substance can be calculated using the principle of conservation of energy.
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 is disadvantages of bomb calorimeter?
Some disadvantages of bomb calorimeters include their high cost, the required specialized training to operate them properly, and the limited range of samples that can be analyzed. Additionally, bomb calorimeters are typically slow to use compared to other analytical methods.
What is oxygen bomb calorimeter?
An oxygen bomb calorimeter is a device used to measure the energy content of a sample by combusting it in a controlled environment and measuring the temperature change. The sample is sealed in a high-pressure vessel (the bomb) with oxygen, ignited, and the heat released is used to calculate the calorific value of the sample. This method is commonly used to determine the energy content of fuels and food.
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.
What is principle of working of bomb calorimeter?
A bomb calorimeter measures the heat of combustion of a substance by burning it inside a high-pressure vessel (bomb) filled with oxygen. The heat released during combustion is absorbed by water surrounding the bomb, which increases the temperature of the water. By measuring the temperature change and knowing the heat capacity of the calorimeter, the energy content of the substance can be calculated using the principle of conservation of energy.
Why bomb calorimeter is called by that name?
The bomb calorimeter gets its name from the sealed vessel (or "bomb") used to hold the sample during combustion. This vessel is designed to withstand high pressure and allow for accurate measurement of the heat released during the reaction.
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 is disadvantages of bomb calorimeter?
Some disadvantages of bomb calorimeters include their high cost, the required specialized training to operate them properly, and the limited range of samples that can be analyzed. Additionally, bomb calorimeters are typically slow to use compared to other analytical methods.
Why the pressure of oxygen becomes low at high altitudes?
At higher altitudes, the air pressure decreases because the air molecules are more spread out. This reduction in pressure means there are fewer oxygen molecules available in the air to be breathed in, leading to lower oxygen levels at high altitudes.
Why does the level of oxygen decreases on high mountain?
The level of oxygen decreases on high mountains because the air pressure decreases as altitude increases. This decrease in air pressure results in lower oxygen content for each breath taken at high elevations, making it harder for the body to get enough oxygen.
How would gas exchange be affected at the top of a tall mountain where air pressure is lower and there is less oxygen then lower elevations?
At high altitudes, atmospheric pressure is lower. Therefore, the partial pressure (partial oxygen) is lower. As partial pressure of oxygen goes down, the body's desire for oxygen goes up.
How would gas exchange be affected at the top of a tall mountain where air pressure is lower and there is less oxygen then at lower elevations?
At high altitudes, atmospheric pressure is lower. Therefore, the partial pressure (partial oxygen) is lower. As partial pressure of oxygen goes down, the body's desire for oxygen goes up.
Why do birds have high blood pressure?
Birds have high blood pressure because they need it to maintain adequate circulation during flight. Their high metabolism and unique circulatory system require increased pressure to deliver oxygen and nutrients efficiently to their muscles and organs while in the air.
What is pressurized oxygen?
Pressurized oxygen is oxygen that is stored in a container under high pressure. It is often used in medical settings to deliver concentrated oxygen to patients with respiratory issues, as well as in industry for processes that require high levels of oxygen.
