It looks like this is what you did already. You won't get -42 if you use initial temperature in Celsius.fromthepast said:Do I have to convert to Kevlin first and then back to Celsius?
The equation for solving PV/nRT for T is T = (PV)/(nR), where P is pressure, V is volume, n is the number of moles, and R is the ideal gas constant.
PV/nRT represents the ideal gas law, which states that the product of pressure and volume is directly proportional to the number of moles of a gas and its temperature, at a constant pressure.
To solve for T, you will need to know the values of P, V, n, and R. Once you have these values, you can plug them into the equation T = (PV)/(nR) and solve for T.
The units for pressure are typically given in atmospheres (atm), while the units for volume are typically given in liters (L). If your given values for P and V are in different units, you will need to convert them to atm and L before plugging them into the equation.
Solving for T allows you to determine the temperature needed to reduce the gas volume to a specific amount, which is important for understanding the behavior of gases under different conditions. It also allows for the calculation of other important gas properties, such as pressure and volume, at different temperatures.