Q:
# What happens to density as temperature increases?

A:
### Quick Answer

**In general, matter expands with rising temperature, which leads to a fall in density.** However, there are important exceptions, such as the case with water when it transforms from the solid to the liquid state. Its molecules contract, leading to both a fall in density and a rise in density.

Credit:
Jelene Morris
CC-BY 2.0

The ideal gas law, PV = nRT, shows that for gases, volume increases with an increase in temperature, which means that density falls. "P" is pressure, "V" is volume, "n" is number of moles and "R" is a constant. The equation shows that if number of moles and pressure are kept constant, an increase in temperature leads to an increase in volume. On the other hand, the equation "density = mass/volume" shows that for other matter, such as pure liquids and solids, density still tends to fall with increasing volume, as most matter expands with a rise in temperature anyway. This shows that, bar a few exceptional cases, density falls with an increase in temperature.

Learn More-
Q:
## How do you convert 270 pounds to kilograms?

A:Converting from pounds to kilograms involves finding the conversion factor of 0.45 kilograms/pound and using this to create a conversion equation. Solving the equation (270 pounds)(0.45 kilograms/pound) supplies the answer of 121.5 kilograms.

Full Answer >Filed Under: -
Q:
## What Is 15 kilograms converted to pounds?

A:Fifteen kilograms is equal to approximately 33.069 pounds. Since there are exactly 2.2046 pounds in 1 kilogram, simply multiply the value in kilograms by 2.2046 to obtain the value in pounds.

Full Answer >Filed Under: -
Q:
## What is a bomb calorimeter used for?

A:A bomb calorimeter is used to determine the enthalpy of combustion of hydrocarbons. Bomb calorimeters are constant volume calorimeters that are used to determine the energy necessary for certain hydrocarbons to undergo a combustion reaction.

Full Answer >Filed Under: -
Q:
## How many watts make one amp?

A:Power in watts equals amperes times voltage. So, in a direct current, 1 amp at 110 volts equals 110 watts, whereas 1 amp at 220 volts equals 220 watts.

Full Answer >Filed Under: