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How much energy is released when 42.5g of aluminum vapor are cooled from 4750 degrees Celsius to 25 degrees Celsius?
Wiki User
∙ 11y ago
q = (42.5 g)(0.902 J/gC)(25o C - 4750o C)
= - 1.8 X 105 Joules
====================negative can be ignored for absolute value, but remember the direction the heat is going.
Wiki User
∙ 11y ago
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Do any matter expand when cooled and contract when heated?
Sort of. In the temperature range of 0-4 Degrees Celsius water contracts when heated and expands when cooled. Outside of this temperature range it behaves normally.
What change happens to liquid water when it is cooled to 0 celsius?
It freezes.
What is the density if water is cooled fron 4 degrees celcius to 0 degrees celcius?
decreases
500cm3 of ideal gas at 40 degrees Celsius and 200kpa absolute is compressed to 250cm3 and cooled to 20 degrees Celsius.What is the final absolute pressure?
Assuming the amount of gas remains constant, we can use the ideal gas law to calculate the final absolute pressure. The initial pressure (P1) is 200 kPa and the final volume (V2) is 250 cm3. The initial temperature (T1) is 40 degrees Celsius or 313.15 Kelvin, and the final temperature (T2) is 20 degrees Celsius or 293.15 Kelvin. Using the equation (P1 * V1) / T1 = (P2 * V2) / T2, we can solve for the final absolute pressure (P2), which is approximately 400 kPa.
A sample of Xenon gas at 20degree Celsius and 0.570 ATM is cooled to a pressure of 0.100 ATM If the volume remains constant What is the final Celsius temperature?
It would be -221.7 deg C.
When water at 4 degrees Celsius is cooled it does it contract?
No. When water is cooled it contracts up to 4 degrees Celsius and then it begins to expand till 0 degrees Celsius. This is called the anomalous expansion of water.
How does nitrogen change into liquid nitrogen?
It has to be cooled to below -196 degrees Celsius or -321 degrees Fahrenheit.
What will happen as the temperature is gradually cooled at 10 degrees celsius?
It will gradually drop to below 10 degrees.
What 5 things expand when cooled?
water True, but only in the range 4 degrees Celsius to zero Celsius.
How many grams of KCl remain in solution at 20 degrees celsius when a solution containing 80g of KCl in 200g of water at 50 degrees Celsius is cooled to 20 degrees Celsius?
32 g KCl
What state change occurs when the gas is cooled to 100 degrees Celsius?
gas to a liquid
What is the mass in grams of a piece of copper that released 125 calories when cooled from 100 degrees Celsius to 25 point 3 degrees Celsius the specific of copper is 00924 cal per g x degrees Celsius?
Q=m s dT m = s dT/Q = 0.00924 X (100-25.3)/125 = 0.0055122 g
What do you remove from nitrogen in order for it to be liquid nitrogen?
You remove heat. Nitrogen must be cooled to -196 degrees Celsius to become a liquid.
What volume is approached for a gas at 0 degrees Celsius cooled by 273 Celsius degrees?
-273 degrees Celsius is nearly 0 Kelvin or absolute zero. While it is believed that it is impossible to achieve a temperature of absolute zero, all gases will solidify before that happens. A pure gas should form perfect crystals.
Do any matter expand when cooled and contract when heated?
Sort of. In the temperature range of 0-4 Degrees Celsius water contracts when heated and expands when cooled. Outside of this temperature range it behaves normally.
Fifty grams of water cooled from 50 degrees to 10 degrees if the specific heat of wayer is 4.2 hoe much was released?
If fifty grams of water cooled from 50 degrees to 10 degrees, and the specific heat of water is 4.2, 135 kJ of heat was released.
What is the mass of water at 25 degrees Celsius if the volume of water is unknown?
Question makes no sense - unanswerable. Nothing changes mass when heated or cooled.
