A sample of gaseous ethanol at its boiling point of 78∘C78^\circ\text{C}78∘C is completely condensed into liquid and then cooled to a final temperature of 25∘C25^\circ\text{C}25∘C. The mass of the ethanol is known.
Which extra information is needed to calculate the total thermal energy released from the ethanol during this entire process?
Specific latent heat of vaporisation of ethanol and specific heat capacity of gaseous ethanol
Specific latent heat of vaporisation of ethanol and specific heat capacity of liquid ethanol
Specific latent heat of fusion of ethanol and specific heat capacity of liquid ethanol
Specific heat capacity of gaseous ethanol and specific heat capacity of liquid ethanol only
27 exam-style questions on OCR GCSE Physics Changes of state. Each one has a worked solution and a mark scheme showing where the marks go.