A container of liquid nitrogen is boiling at −196∘C-196^\circ\text{C}−196∘C in a laboratory where the room temperature is 20∘C20^\circ\text{C}20∘C. On another bench in the same laboratory, a block of ice at 0∘C0^\circ\text{C}0∘C is melting.
What is happening to the temperature of the boiling liquid nitrogen and the temperature of the melting ice?
Temperature of boiling liquid nitrogen is constant; temperature of melting ice is constant
Temperature of boiling liquid nitrogen is constant; temperature of melting ice is increasing
Temperature of boiling liquid nitrogen is increasing; temperature of melting ice is constant
Temperature of boiling liquid nitrogen is increasing; temperature of melting ice is increasing
313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.