hydrogen gas

The gas that was produced by the reaction of zinc and hydrochloric acid was Hydrogen gas and zinc chloride. In the presence of fire, hydrogen explodes with a popping sound. The popping sound put out the flame.

When the BTB was exposed to the CO2 gas, BTB is blue and becomes yellow. The color change indicates the presence of an acidic substance. The acid is H2CO3 carbonic acid. 3.

Oxygen radicals harm the fats, protein and DNA in your body. This damages your eyes so you can’t see properly, and your lungs, so you can’t breathe normally. So breathing pure oxygen is quite dangerous.

Hydrogen is flammable, but oxygen is not. Flammability is the ability of a combustible material with an adequate supply of oxygen (or another oxidiser) to sustain enough heat energy to keep a fire going after it has been ignited.

No. In order for something to be combustible it must have some chemical potential energy that can be released by reacting that something with oxygen. In the case of air, everything is already stable, and it would actually require additional energy to pull it apart in order to bond it with oxygen.

Spontaneous ignition temperatures for stoichiometric methane-air mixtures are around 870 K (600°C) at atmospheric pressure and decrease to 660 K (390°C) at 1100 bar ignition pressure.

What happens when air is heated or cooled? So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward. This is the concept used in the hot air balloons.

Most experts consider 195 degrees Fahrenheit as the “line in the sand” when it comes to tire temperature: Beyond that point, the temperature will start impacting tire life. At 250 degrees, a tire will start to lose structural strength, could begin experiencing tread reversion and the tire will begin to lose strength.

When you have heat intolerance, it’s often because your body isn’t regulating its temperature properly. The hypothalamus is a part of the brain that regulates your body’s temperature. When you get too hot, your hypothalamus sends a signal through your nerves to your skin, telling it to increase sweat production.

Hot air is lighter than cold air. The reason fr this is when air gets heated up it expands and becomes less dense than the air surrounding it also the distance between the molecules increases. So the less dense air floats in the much denser air just like ice floats on water as ice is less dense than water.

Cold air is always heavier than an equal volume of hot air. “Air” is actually a mixture of several gases. By volume, dry air contains 78.09 percent nitrogen, 20.95 percent oxygen, 0.93 percent argon, 0.039 percent carbon dioxide and small amounts of other gases.

air has mass and density, and. cold air is denser than warm air.

Warm air is lighter than cold air because they have more heat energy, which results in the increase in distances between the molecules. This decraeses the density, and hence makes it lighter than cold air.

It is more dense because the molecules are closer together and they are closer together because the bonds are absorbing less energy and therefore do not move as much.

Warm air molecules have more heat energy, as molecules have more energy there is an increase in distance between molecules. As distance between molecules increases, density decreases.

As air warms up, the molecules start to vibrate and bump into each other, increasing the space around each molecule. The opposite effect happens when air cools. As the temperature drops, molecules move more slowly, taking up less room. The amount of space the air takes up shrinks, or reduces the air pressure.

It takes less energy to change the temperature of land compared to water. This means that land heats and cools more quickly than water and this difference affects the climate of different areas on Earth. Different energy transfer processes also contribute to different rates of heating between land and water.

Atmosphere Interactions As air rises, air pressure at the surface is lowered. Rising air expands and cools (adiabatic cooling: that is, it cools due to change in volume as opposed to adding or taking away of heat). The result is condensation/precipitation. Cold air sinks.

Subsidence, or sinking of air, may happen instead, forming an area of high pressure, an anticyclone. Warming of the air as it subsides increases evaporation, causing clear skies. That is why high pressure systems are usually associated with fair weather.

What conditions are necessary for an air mass to form? It must stay over a land or sea surface long enough to acquire the temp/humidity/stability characteristics of the surface below. They are associated with source regions, they must be extensive, physically uniform, and have stationary air.

mesosphere

On the earth’s surface, there are seven pressure belts. They are the Equatorial Low, the two Subtropical highs, the two Subpolar lows, and the two Polar highs. Except for the Equatorial low, the others form matching pairs in the Northern and Southern Hemispheres.

Convection is the term commonly applied to vertical movement of air, whilst advection is used in the context of horizontal displacement of air.

There are 5 major factors affecting global air circulation : – uneven heating of earth’s surface, seasonal changes in temperature and precipitation, rotating of earth on its axis, properties of air and water and long term variation in the amount of solar energy striking the earth.

The local difference in temperature and pressure causes local winds. It is of four types: hot, cold, convectional and slope.