A student freezes 75 g of liquid water to form ice. They then melt all of the ice back into liquid water.
Which statement is true?
The mass of the ice produced is less than 75 g75\text{ g}75 g.
The mass of the ice produced is more than 75 g75\text{ g}75 g.
The mass of the water at the end is 75 g75\text{ g}75 g.
The mass of the water at the end is less than 75 g75\text{ g}75 g.
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.