Table of Contents
What happens to the temperature of air when it expands what happens to the temperature of air when it expands?
As a gas (like air) expands, the value of V increases and this has the effect of increasing T (The temperature). As the energy needed to increase it’s temperature must be supplied from somewhere, the gas takes the energy from the surrounding system giving the effect of cooling.
What causes the temperature of the air to change?
The temperature of the air is caused by the combination of air, water, and land working together. Those three factors heat and cool areas at different rates. Temperature also varies by the time of day, the season, or even the year.
What happens when the air inside the balloon is heated?
When the air inside the balloon is heated, the speed of movement of those air molecules increases and the pressure goes up. After a while the balloon is completely expanded and the flight is ready to take off.
Where does the energy come from to cause the temperature to rise?
When a substance heats up, the rise in temperature makes these particles move faster and bump into each other. Thermal energy is the energy that comes from the heated up substance. The hotter the substance, the more its particles move, and the higher its thermal energy.
What will happen when air becomes warmer and drier as it moves down the leeward side?
The orographic effect creates cooler air moving up the windward side of mountains and warmer air moving down the leeward side. Such rapid warming and drying of air can produce very high winds known as Chinook or Foehn winds.
How much does air expand with temperature?
Air at the temperature of freezing water, has its volume doubled when heated 491 degrees, and when heated 982 degrees, or twice as intensely, its volume is tripled, which is the effect of a low red heat.
What is the relationship among heat added to a system?
What is the relationship among heat added to a system, a change in the system’s internal energy, and external work done by the system? The heat added to a system is equal to the change in internal energy plus the external work done by the system. What happens to the internal energy of a system when mechanical work is done on it?
What happens when two systems are at the same temperature?
This occurs when the systems are at the same temperature. In other words, systems at the same temperature will be in thermal equilibrium with each other. The first law of thermodynamics relates changes in internal energy to heat added to a system and the work done by a system.
What is the temperature of air that is twice as hot?
An equal amount of 0°C air that is twice as hot has a temperature of 273°C. The first law of thermodynamics is a restatement of the conservation of energy. A soda-pop can containing only steam is placed top downward in a pan of water. Whap! The can is dramatically crushed by atmospheric pressure.
The internal energy of an ideal gas is proportional to the temperature, so if the temperature is kept fixed the internal energy does not change. The first law, which deals with changes in the internal energy, thus becomes 0 = Q – W, so Q = W.