Which of the following is not a variable that can be manipulated in a gas law equation?
Pressure
Temperature
Density
Volume
Temperature?
I change my mind I believe it is Volume
No on both. In PV = nRT for example, p is a variable, v is a variable, n is a variable, T is a variable, R is a constant (and not a variable).
Do you know what a variable is. Look up the definition.
To determine which of the variables in a gas law equation cannot be manipulated, we need to understand the different gas laws and their equations.
The main gas laws include Boyle's law, Charles's law, Avogadro's law, and the combined gas law. These laws relate different properties of the gas, such as pressure (P), temperature (T), volume (V), and the number of moles of gas (n).
Boyle's law states that at a constant temperature, the pressure of a gas is inversely proportional to its volume. The equation for Boyle's law is P1V1 = P2V2. In this equation, the pressure (P) and volume (V) can be manipulated, while the temperature (T) remains constant.
Charles's law states that at a constant pressure, the volume of a gas is directly proportional to its temperature. The equation for Charles's law is V1/T1 = V2/T2. In this equation, the volume (V) and temperature (T) can be manipulated, while the pressure (P) remains constant.
Avogadro's law states that equal volumes of gases, at the same temperature and pressure, contain the same number of particles. The equation for Avogadro's law is V1/n1 = V2/n2. In this equation, the volume (V) and the number of moles (n) can be manipulated, while the pressure (P) and temperature (T) remain constant.
Lastly, the combined gas law combines Boyle's law, Charles's law, and Avogadro's law into one equation. The equation for the combined gas law is P1V1/T1 = P2V2/T2. In this equation, all four variables (P, V, T, and n) can be manipulated.
Based on this understanding, the variable that cannot be manipulated in any of these gas law equations is density (D). Density is not one of the variables that directly affect or are affected by the other gas properties in these equations. Therefore, density is the correct answer to the question, and the other variables – pressure (P), temperature (T), and volume (V) – can be manipulated in gas law equations.