Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
![**Question 19 of 21**
**What would be the density (in g/L) of a sample of \(C_2H_2Cl_2\) gas at 70.0 °C and 2.50 atm of pressure?**
Below the question, there is an answer input area with a numeric keypad for entering the answer. There are keys for digits 0-9, a decimal point, a plus/minus sign, and a button to clear the input. Additionally, there are function buttons, possibly for scientific notation.
**Instructions for the Users:**
- Carefully read the question and determine the given values:
- Temperature: 70.0 °C
- Pressure: 2.50 atm
- Substance: \(C_2H_2Cl_2\) gas
- Use knowledge of gas laws, especially the Ideal Gas Law, to calculate the density of the gas. Recall the Ideal Gas Law formula: \(PV = nRT\).
- Ensure the units are consistent, particularly temperature in Kelvin (K).
**Conversion reminder:**
\[ T(K) = T(°C) + 273.15 \]
**Keypad Usage Tips:**
- Use the numeric keys to input your answer.
- Utilize the plus/minus key if your answer is negative.
- Use the decimal point for non-integer values.
- If you make an error, use the clear button to reset your input.
- For answers in scientific notation, use the \( \times 10^{n} \) button.
**Note:**
- Final answers should be presented with proper units (g/L).
This question is designed to test your understanding of gas density calculations under varying temperature and pressure conditions.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6895f9cd-8521-4c9a-bc62-df11c4ac3cae%2F0ca53517-a7b4-43c1-b18e-9caeb70c56a0%2Fq9wmtd_processed.jpeg&w=3840&q=75)
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