If 400 J of work is done on an object in 8 seconds
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The rate of reaction between oxygen and copper is higher at high temperature. The rate of reaction between oxygen and copper is lower at room temperature.
at high temperature copper penny will react with oxygen as shown below
The reaction does not occur easily at room temperature
We can say that the reaction between copper and oxygen is an endothermic reaction so the rate of reaction is high at high temperature.
The bond energy of oxygen molecules need energy to react with copper and form copper oxide.
Answer:
The density of CO₂ gas at 27 Celsius and 0.500 atm is 0.89
Explanation:
An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
<u><em>P*V = n*R*T Equation (A)</em></u>
where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas.
Density allows you to measure the amount of mass in a given volume of a substance. So density is defined as the quotient between the mass of a body and the volume it occupies:
Being the molar mass of a substance the mass contained in one mole of said substance, the number of moles can be expressed as:
<em>Equation (B)</em>
Replacing in <u><em>Equation (A)</em></u>:
P*V= *R*T
Solving to get the definition of density expressed in the equation, you get:
Being:
- P=0.500 atm
- Molar mass CO₂= 44 g/mole
- R= 0.082
- T= 27 C= 300 K (being 0 C=273 K)
and replacing:
you get:
density= 0.89
<em><u>The density of CO₂ gas at 27 Celsius and 0.500 atm is 0.89 </u></em><em><u></u></em>