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How much heat is released when 250 g of water at 10 degrees Celsius freezes into ice and cools to -10 degrees Celsius?
250g of water at 10C needs to lose 1 cal/g/C or 2500 calories to drop temperature to zero.
The latent heat of fusion of water is 80 calories per gram at 0C so, the water needs to lose 20,000 calories to turn to ice at 0C
Finally, the ice needs to lose 0.316 cal/g/C or 790 calories to drop to -10C
The total heat released is then 2500 + 20,000 + 790 = 23,290 calories
What else can I help you with?
Does water that cools from 4 degrees celsius to 0 degrees celsius remain the same in density?
No, water's density decreases as it cools. Water reaches its maximum density at around 4 degrees Celsius, and as it cools further, the water molecules form a crystalline structure, causing the density to decrease.
Does water continue to expand as it cools after forming ice?
No, water reaches its maximum density at about 4 degrees Celsius and starts to expand as it cools further. When water transitions into ice, it expands due to the crystal lattice structure of the ice molecules.
WhenDensity of water at 4 degee Celsius slightly increase when it is what?
When water reaches its maximum density at 4 degrees Celsius, any further decrease or increase in temperature will cause the density of water to slightly increase. This is due to the unique properties of water, where the density increases as it cools down until it reaches 4 degrees Celsius, and then starts to decrease as it freezes.
What forms when water heats or cools?
When water heats, it undergoes a phase change from liquid to vapor, forming water vapor or steam as it evaporates. Conversely, when water cools, it can form ice as it freezes at 0 degrees Celsius (32 degrees Fahrenheit). Additionally, during cooling, condensation can occur, forming liquid water droplets from water vapor in the air. These processes illustrate the dynamic nature of water's phase transitions.
At what temperature does dry ice change state?
CO2, or carbon dioxide, will freeze at -78 degrees Celsius at normal pressure.
What temperature does pure water reach maximum density?
Pure water reaches its maximum density at a temperature of approximately 4 degrees Celsius. This is why water typically contracts as it cools below this temperature, but expands as it freezes into ice.
What temperature do its particles become fixed into place as water it cooled?
The temperature at which water particles become fixed into place as it cools is 0 degrees Celsius, when it freezes and turns into ice.
Is 25 degree Celsius considered cool?
25 degrees Celsius is typically considered comfortable or mild, but not cool. Cool temperatures are usually considered to be around 15-20 degrees Celsius.
Does water that cools from 4 degrees celsius to 0 degrees celsius remain the same in density?
No, water's density decreases as it cools. Water reaches its maximum density at around 4 degrees Celsius, and as it cools further, the water molecules form a crystalline structure, causing the density to decrease.
Does water contract when froze?
Yes, water contracts when it freezes. As water cools below 4 degrees Celsius, it begins to contract until it reaches its freezing point of 0 degrees Celsius, at which point it expands as it forms ice crystals. This expansion is known as the anomaly of water and is why ice is less dense than liquid water.
What is unique about water as it gets colder and colder?
It's most dense at 4 degrees celsius. Get any lower and it takes up more volume. As a general rule, chemicals get denser as they get colder.
Why does water expands at 4 degree celsius?
Water expands at 4 degrees Celsius because this is the temperature at which it reaches its maximum density. As water cools below 4 degrees Celsius, it begins to expand and become less dense, eventually transforming into ice. This unique property of water is due to the hydrogen bonding between water molecules.
What is the density if water is cooled fron 4 degrees celcius to 0 degrees celcius?
The density of water increases as it cools from 4 degrees Celsius to 0 degrees Celsius. At 4 degrees Celsius, the density of water is 999.972 kg/m³, and at 0 degrees Celsius the density is 999.8395 kg/m³.
Why does a pond freeze from the bottom?
A pond freezes from the bottom because water is most dense at around 4 degrees Celsius. When the top layer of water cools and freezes, it becomes less dense and remains on top, insulating the warmer water below. This allows the colder water to continue freezing from the bottom up.
Does water continue to expand as it cools after forming ice?
No, water reaches its maximum density at about 4 degrees Celsius and starts to expand as it cools further. When water transitions into ice, it expands due to the crystal lattice structure of the ice molecules.
Two identical blocks of iron one at 10 degrees celsius and the other at 20 degrees celsius are put in contact suppose the cooler block cools to 5 degrees celsius and the warmer block warms to 25?
Violation of 2nd Law
Describe the motion of the particle of a solid as it cools from -250 degrees Celsius to -273.15 degrees Celsius?
As the solid particle cools from -250 degrees Celsius to -273.15 degrees Celsius, the particles will lose kinetic energy and slow down, causing them to vibrate less and move closer together. At -273.15 degrees Celsius, the particles will reach absolute zero and stop all motion, resulting in a state of minimum energy and temperature known as absolute zero.
