Question

The graph below shows the variation of the temperature of 200 g of lead metal as it is heated at a steady rate. 800 600- Temperature/°C 400 200 0- O 100 300 400 200 Time/s a) Use the graph to state the melting point of lead. [1] b) Explain why the graph is a straight line at the start. [1] c) Explain what happens to the energy supplied to the lead as it melts at a constant temperature. [1] d) The initial temperature of the lead is 0°C. Use the graph to determine the total energy supplied to the lead before it starts to melt. The specific heat capacity of lead is 130 J kg-1K-1.​

Answer 1

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