Final answer:
To calculate the work done by isobaric heating of krypton, the pressure and volume change need to be known. Without this information, the work cannot be determined. By analogy, if we have a similar example with known pressure and volume change, we can perform the calculation using the formula for isobaric processes.
Step-by-step explanation:
To find the work done by krypton when heated isobarically to 20 K, we need to use the formula for work done in an isobaric process: W = PΔV, where P is the pressure and ΔV is the change in volume. First, we calculate the number of moles of krypton: n = mass / molar mass = 840 g / 84 gmol = 10 moles. However, since we're not given the pressure or volume change, we cannot calculate the work done without this additional information. In a similar example where we know the pressure and volume change, such as a system containing oxygen gas heated at a constant pressure of 40.0 atm with its volume increasing from 177 L to 458 L, we can calculate the work done: W = 40.0 atm × (458 L - 177 L) × 101.325 J/L·atm = 40.0 × 281 L × 101.325 J/L·atm = 1135717 J = 1135.717 kJ.