A thermal management system in a communications satellite uses liquid ammonia to absorb waste heat from the onboard electronics.
At the start of a test cycle, the mass of liquid ammonia in the cooling reservoir is 1.85 kg.
While the satellite operates under high load, the ammonia boils, absorbing thermal energy from the electronics. When the test cycle is completed, the remaining mass of liquid ammonia in the reservoir is found to be 1.49 kg.
The total thermal energy transferred to the ammonia while it was boiling is 493 200 J493\,200\text{ J}493200 J.
Calculate the specific latent heat of vaporisation of ammonia.
Practise Edexcel GCSE Physics Heating, specific heat and latent heat with exam-style questions for Foundation and Higher tier. 81 questions, matched to the Edexcel GCSE Physics (1PH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.