What is the work done when a volume decreases from 5 liters to 3 liters at 4 atm of pressure? (Conversion factor: 1 Latm = 100J)

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

‘which reaction would most likely require the use of an inert electrode?

Calculate the temperature rise when 0.2g of propane is used to heat 400cm cubed of water.