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When a 19.2 g sample of KCN dissolves in 65.0 g of water in a calorimeter the temperature drops from 28.1 degrees Celsius to 15.4 degrees Celsius Calculate ΔH for the process?
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Why the brass need to be immersed in the boiling water before place it in the calorimeter?
The brass needs to be immersed in the boiling water for a sufficient enough time that its temperature is the same as the boiling water, 100 degrees Celsius. That will be the initial temperature of the brass. After it is quickly placed in the calorimeter which will contain much cooler water, causing the brass to cool down and the water to heat up until the point where the temperature no longer changes. At that point the temperature of the brass is the same temperature as the water in the calorimeter, which is its final temperature of the brass.
Why is water an excellent material to use in a calorimeter?
Water is an excellent material to use in a calorimeter because it has a very high specific heat, making it very hard for water to raise its temperature even by 1 degree celsius, but as hard as it was to raise the temperature of the water, it is equally as hard to lower the temperature of the water-making it able to effectively retain heat and allowing the other material inside of the calorimeter to absorb that heat.
What is the correct formula for calculating the change of temperature from Fahrenheit to Celsius?
To calculate Fahrenheit to Celsius, you take the temperature in Fahrenheit and multiply it by 0.8. Using the answer of that number, subtract 32 from it. That is your temperature in Celsius. To change that temperature back to Fahrenheit, you would add 32 to your Celsius temperature. After getting that answer, you divide it by 0.8 and Voislá, you're back at your temperature in Fahrenheit.
What do you add to the Celsius temperature to calculate the Kelvin temperature?
You add +273.15. For example, +20°C = +293.15 K.
Is it true that a ratio is a rate?
No. It can be but need not be. For example, you might calculate the ratio of today's temperature in Celsius and in Fahrenheit and calculate the ratio. That is not a rate.
How do you calculate temperature from Fahrenheit to celsius?
Use this equation to convert degrees Fahrenheit (ºF) to degrees Celsius/Centigrade (ºC): [°C] = ([°F] - 32) × 0.556
How is heat measured Identify instruments used to measure heat?
—Thermometers. —Celsius Scale —Kelvin scale —Calorimeter
Is Celsius the opposite of temperature?
No, Celsius is a temperature scale.
What is the temperature of hot oatmeal in Celsius?
the temperature for hot oatmeal in Celsius is about 74 Celsius
What is 162 Kelvin equal to in degrees Fahrenheit?
162 kelvin = -168.07 degrees Fahrenheit To calculate Kelvin temperatures, you simply add 273.15 to the Celsius temperature. The formula is as such: Kelvin temperature = Celsius temperature + 273.15 degrees. To change Fahrenheit to Celsius, subtract 32 and then divide by 9. Multiply that result by 5. The formula is as such: Celsius = [(Fahrenheit - 32) / 9] x 5.
What is the Celsius temperature if the Fahrenheit temperature is 32?
Zero Celsius
How long does sand take to melt?
Sand doesn't dissolve at temperature, it only dissolves in solutions such as acid.
