Temperature Changes In A System And Specific Heat Capacity (GCSE Physics)

A student mixes 100 g of water at 80 °C with 100 g at 20 °C in an insulated container. What is the final temperature (neglect heat loss)?

Why is thermal energy stored during melting not associated with a temperature change?

Which change would increase the rate at which a hot metal block cools in air?

In an experiment to find the specific heat capacity of an unknown, why must the energy supplied to the block be measured accurately?

During a cooling experiment the time for a fixed ?T increases when using thicker insulation. Which conclusion is best?

Which formula correctly relates thermal energy change (Q), mass (m), specific heat capacity (c) and temperature change (?T)?

Two identical blocks at the same initial temperature are left to cool: block A is matt black and block B is shiny silver. Which statement is correct about thermal radiation?

Why does adding insulation around a heated container reduce its rate of cooling?

A sample of water of mass 0.5 kg is heated from 15 °C to 35 °C. Using c = 4200 J/kg °C, how much energy is required?

A 2.0 kg block of iron (c = 450 J/kg °C) is heated from 20 °C to 80 °C. How much energy is stored as thermal energy?

During an experiment, the measured temperature drops by 20 °C in 400 s with one insulator and 20 °C in 700 s with another. What does the longer time indicate?