What is the pressure of the gas in this mercury manometer if H 73 mm and atmospheric pressure is 785 mmHg?

What is the pressure of the gas in this mercury manometer if H 71 mm and atmospheric pressure is 785 mmHg? Thus, the pressure of the gas in a mercury manometer is 852 mmHg.

How do you find the pressure in a mercury manometer?

How do you calculate mercury pressure?

Show the calculation supporting the claim that atmospheric pressure near sea level corresponds to the pressure exerted by a column of mercury that is about 760 mm high. The density of mercury = 13.6 g/cm3. The hydrostatic pressure is given by p = hρg, with h = 760 mm, ρ = 13.6 g/cm3, and g = 9.81 m/s2.

How do you use a manometer to measure the pressure of a gas?

How do you find the pressure of a gas?

If volume and temperature are held constant, the ideal gas equation can be rearranged to show that the pressure of a sample of gas is directly proportional to the number of moles of gas present: P=n(RTV)=n×const.

What is the pressure of mercury?

The pressure of Mercury’s atmosphere was determined to be about 10−12 bar (compared to the 1 bar atmospheric pressure at sea level on Earth).

What is the pressure in the gas chamber of the manometer?

1.38 bar
Open end mercury manometer is connected to a gas chamber containing gas at a pressure of 1.38 bar.

How do you calculate pressure in a manometer?

How do u calculate pressure?

Pressure on surfaces
  1. To calculate pressure, you need to know two things:
  2. Pressure is calculated using this equation:
  3. pressure = force ÷ area.

What is the pressure of the gas in tube?

The gas pressure may range between 0.001 and 1,000 Torr (0.13–130,000 Pa); most commonly, pressures between 1–10 torr are used.

How do you find the pressure of a gas container?

P=nRTV .

How does the vapor pressure of mercury affect the pressure reading of the manometer?

When mercury is used as a liquid for manometer, the vapor pressure of water at 20 °C (2.33kPa) will produce 17.5mm of height difference. Procedure for measuring the saturated vapor pressure of a pure liquid at a specific temperature.

What is Gas pressure Bitesize?

Gas pressure is caused when gas particles hit the walls of their container. The more often the particles hit the walls, and the faster they are moving when they do this, the higher the pressure. This is why the pressure in a tyre or balloon goes up when more air is pumped in.

Is gas have pressure?

Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. … The particles exert more force on the interior volume of the container. This force is called pressure.

How do you find the pressure in a tube?

What is gas pressure GCSE?

Gas pressure

The force acting on the container due to these collisions is at right angles to the container. For example, the collisions caused by a gas trapped inside a balloon cause forces to act outwards in all directions, giving the balloon its shape.

What is gas pressure in chemistry?

Gas pressure is caused by the force exerted by gas molecules colliding with the surfaces of objects (Figure 1). Although the force of each collision is very small, any surface of appreciable area experiences a large number of collisions in a short time, which can result in a high pressure.

What causes atmospheric pressure?

At sea level, standard air pressure is 29.92 inches of mercury. … This change in pressure is caused by changes in air density, and air density is related to temperature. Warm air is less dense than cooler air because the gas molecules in warm air have a greater velocity and are farther apart than in cooler air.

How do you calculate gas pressure in Igcse?

How is gas affected by pressure?

The pressure and volume of a gas are inversely proportional. Therefore, as you increase the pressure on a gas, the volume decreases. This means that as the pressure on a gas increases, the gas has less space to spread out and the particles are closer together.

What is pressure short answer?

Pressure is defined as the physical force exerted on an object. The force applied is perpendicular to the surface of objects per unit area. The basic formula for pressure is F/A (Force per unit area). Unit of pressure is Pascals (Pa). Types of Pressures are Absolute, Atmospheric, Differential, and Gauge Pressure.

How do you find pressure from volume?

For example, if you want to calculate the volume of 40 moles of a gas under a pressure of 1013 hPa and at a temperature of 250 K, the result will be equal to: V = nRT/p = 40 * 8.3144598 * 250 / 101300 = 0.82 m³ .