Question

If 250cm³ of a gas at STP is heated to 27oC at constant pressure calculate it's new volume calculate the amount (in moles) of gas which occupies 250cm³at stp​

Answer 1

To calculate the new volume of the gas at 27oC, you can use the combined gas law. The amount of gas that occupies 250cm³ at STP is approximately 0.01116 moles.

Step-by-step explanation:

To calculate the new volume of the gas at 27oC, we can use the combined gas law. The combined gas law states that PV/T is constant, where P is the pressure, V is the volume, and T is the temperature.

Since the pressure is constant and the gas is at STP (standard temperature and pressure), we can use the molar volume of a gas at STP, which is 22.4 L/mol. So if 250cm³ of gas occupies this volume at STP, we can calculate the number of moles of gas using the equation:

250 cm³ x (1 L / 1000 cm³) x (1 mol / 22.4 L) = 0.011160 moles

Therefore, the amount of gas that occupies 250cm³ at STP is approximately 0.01116 moles.