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
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.