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What is the importance of wiping the ice before introducing it to the water in the calorimeter?
The specific heat of water is different from the specific heat of ice and so 'wet ice' into a calorimeter experiment can increase the mass of water in the calorimeter and become a source of unaccuracy.
Why is it required to tap the hot metal with a tissue paper before placing the hot metal in the calorimeter?
Tapping the hot metal with a tissue paper removes excess water or moisture on the surface, ensuring that only the thermal energy from the metal is transferred to the water in the calorimeter. This helps to prevent any additional heat transfer that may affect the accuracy of the calorimetry experiment.
Why is it important to write a balanced reaction before determining the equilibrium expression and equilibrium concentrations?
So you can use the coefficants to go from one substance to another
Explain the experiment to determine the calorific value of fuel using dulong's formula?
To determine the calorific value of a fuel using Dulong's formula, you would first measure the mass of the fuel and then burn it completely in a calorimeter, which measures the heat released during combustion. From the heat released, the calorific value can be calculated using Dulong's formula, which takes into account the carbon, hydrogen, and sulfur content of the fuel. This formula is Calorific Value (CV) = 337(Carbon%) + 1442(Hydrogen%) + 93(Sulfur%) – 87(Ash%).
What is the scout titration?
The scout titration is a preliminary titration carried out to estimate the approximate endpoint in a titration experiment before performing the actual titration. It helps in determining the approximate volume of titrant required for the main titration to avoid overshooting the endpoint.
What must you do before determining gravitational PE?
you must determine hight
What is the importance of wiping the ice dry before introducing it to the water in the calorimeter and how would it affect the outcome of the experiment?
The specific heat of water is different from the specific heat of ice and so 'wet ice' into a calorimeter experiment can increase the mass of water in the calorimeter and become a source of unaccuracy.
What is the importance of wiping the ice before introducing it to the water in the calorimeter?
The specific heat of water is different from the specific heat of ice and so 'wet ice' into a calorimeter experiment can increase the mass of water in the calorimeter and become a source of unaccuracy.
What are the objectives of investment analysis?
This analysis is important to determine the risks of the investment. This is important before making an investment decision.
What must you do first before determining gravitational PE?
Before determining gravitational potential energy, you must identify the object's height or distance above a reference point, like the ground or a particular level. This reference point will help calculate the gravitational potential energy based on their relative positions.
Why is it necessary to wait until the following week before determining the melting point of your unknown?
It allows for the unknown to fully dry out and then you can determine the mass of the unknown without any water mass.
What is the effect on the measurement using the balance without determining its zero point first?
If you don't determine the zero point of a balance before taking measurements, it can lead to inaccuracies in the readings. This is because the weight of the container or any residue left on the balance may affect the measurement result. It is important to always zero the balance before measuring to ensure accurate and reliable results.
Why is it necessary to weigh food before burning?
Weighing food before burning it allows us to measure the amount of energy released during combustion. This information is important for determining the calorie content of the food.
When analysing data or entries it is necessary to determine their expected outcome before recording them True of false and why?
It is neither true nor false.It is important that you have a view about the expected outcomes so that you can test whether or not the assumptions for the model - independent, identically distributed errors - is valid or not. While these are based on the differences between the expected and observed outcomes, it is not necessary to determine the expected outcomes beforehand. Determining their distribution is sufficient.
Why it is important to first obtain the absorption spectrum of the soft drink before making a calibration?
to determine the wavelength of maximum absorption
What is the purpose of stirring the mixture in the calorimiter after the hot sample was poured into it?
Stirring the mixture in the calorimeter ensures that the hot sample's temperature is evenly distributed throughout the system. This allows for accurate measurement of the heat transfer that occurs during the reaction or process taking place in the calorimeter.
What are the use of a calorimeter?
A calorimeter is a device used for calorimetry, the science of measuring the heat of chemical reactions or physical changes as well as heat capacity. The word calorimeter is derived from the Latin word calore, meaning heat. Differential scanning calorimeters, isothermal microcalorimeters, 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.
