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Density of air?
Being a gas, the density of air can vary a lot, depending on its temperature and pressure. At sea level, it is usually close to 1.2 kilograms per cubic meter.
What is the density of PCB in grams?
The density of polychlorinated biphenyl cogeners varies, generally between approximately 1 g/cm3 and 1.6 g/cm3 at 25°C (density will also tend to vary with temperature). The density of aroclor 1254 (a PCB that is 54% chlorine) is 1.51 g/cm3 at 25°C. The density of aroclor 1260 (a PCB that is 60% chlorine) is 1.593 g/cm3 at 25°C.
What characteristic divides earth's atmosphere into layers?
The characteristic is temperature. While pressure diminishes with increasing altitude, it is dependent on the underlying air masses. Temperature changes vary consistently within each of the major layers (troposphere, stratosphere, mesosphere, thermosphere, exosphere).
How much does a piece of metal weigh?
That would vary greatly depending on the type and density of the metal, along with the dimensions of the particular piece. The weight of a piece of anything is the volume times the density.
What is the temperature range in the tropical ocean?
Temperature ranges in a tropical ocean vary from around 77 degrees to 95 degrees. Temperature fluctuations happen during different seasons and storms.
What is the density of salt- water solution?
This depends on salt concentration; however it ranges roughly from 1.0 (low) to 1.6 g/mL at high concentration. Seawater 1.02 - 1.03
What are the three physical properties that vary with temperature?
Three physical properties that vary with temperature are volume, density, and thermal expansion coefficient. As temperature increases, volume generally expands, which can lead to a decrease in density. The thermal expansion coefficient quantifies how much a material expands or contracts with changes in temperature.
Why is that the density of the same substance vary?
The density of a substance can vary due to differences in temperature, pressure, and impurities present in the material. Changes in temperature can cause the molecules to move further apart or closer together, affecting the overall density. Pressure can also compress or expand the material, altering its density. Additionally, impurities or variations in the material's composition can result in differences in density.
What changes most as you increase the temperature - the solubility in fresh or sea water?
As temperature increases, the solubility of most salts generally increases in fresh water, while the solubility of gases typically decreases. In seawater, the effect of temperature on solubility can vary due to the presence of salts and other solutes, but generally, the solubility of gases decreases with higher temperatures. Therefore, while both fresh and seawater experience changes in solubility with temperature, the specific effects can differ based on the solute involved.
What is the critical pressure of seawater?
The critical pressure of seawater, which is the pressure above which water cannot exist as a liquid regardless of temperature, is approximately 22.1 megapascals (MPa) or about 220 atmospheres. This value can vary slightly depending on the salinity and temperature of the seawater. At this pressure, seawater transitions to a supercritical fluid state, exhibiting properties of both liquids and gases.
What is the density of steel as per IS 2062?
The density of steel as per IS 2062 will vary. This is because steel's density typically changes with composition.
What is the Density of air at 0 C?
At standard pressure (100 kPa), dry air at 0 °C has a density of 1.2754 kg/m3 or 1.2754 g/L. Changing the composition, pressure, temperature or humidity changes the density.
How do pressure and temperature vary in the atmosphere?
In the atmosphere, pressure generally decreases with higher altitude due to the decrease in air density. Temperature changes can vary depending on altitude and location, but in general, the temperature decreases with increasing altitude in the troposphere, remains relatively constant in the stratosphere, and then increases in the mesosphere and thermosphere.
What has a density of 0.647?
The substance with a density of 0.647 g/cm³ is likely ethanol at room temperature. Ethanol has a density close to this value, which can vary slightly depending on temperature and impurities.
Why are density and phase listed at specific temperature?
Density and phase are typically listed at specific temperatures because both properties are highly temperature-dependent. As temperature changes, the arrangement and energy of molecules in a substance can vary, affecting its density (mass per unit volume) and phase (solid, liquid, gas). For instance, most substances expand when heated, leading to a decrease in density, and can transition between phases at specific temperatures, such as melting and boiling points. Specifying temperature ensures accurate and consistent measurements for scientific and engineering applications.
Is the enthalpy change (H) independent of temperature?
No, the enthalpy change (H) is not independent of temperature. It can vary with temperature changes.
What is the density of dish soap at room temperature?
The density of dish soap at room temperature can vary depending on the brand and formulation, but it typically ranges from 0.95 to 1.05 grams per milliliter.
