Changes Of State And Specific Latent Heat (GCSE Physics)

Which of the following best describes specific latent heat?

When a substance freezes, what happens to the internal energy and particle arrangement?

A student measures energy input Q from an electrical heater by Q = V I t. Which instrument readings are needed?

When steam at 100 °C condenses on skin, why can it cause more severe burns than water at 100 °C?

When ice at 0 °C melts to liquid water at 0 °C, which of the following describes what happens to the energy added?

A 500 g sample of water at 20 °C is heated to 100 °C and then all vaporised. Using c = 4200 J/kg °C and Lv = 2.26 × 10^6 J/kg, calculate the total energy required.

A block of ice absorbs 10 000 J to melt completely. What mass of ice melts if the latent heat of fusion of ice is 3.34 × 10^5 J/kg?

A student uses a joulemeter and measures voltage, current and time to find energy input to boil water. Which result will most affect the uncertainty in a calculated latent heat value?

Which statement about boiling and evaporation is correct?

A student finds the energy required to melt 0.2 kg of aluminium is 6.84 × 10^4 J. What latent heat of fusion did they calculate for aluminium?

A 1.5 kg block of ice at 0 °C is placed in a warmer room. Which energy change occurs first as heat is added?