The graph below the variation of the temperature of 200 m s tiste seady rate
1
100
200
There's
a) Use the graph to state the melting point of lead
191
b) Explain why the graph is a straight line at the start
c) Explain what happens to the energy supplied to the land as it melts at a
constant temperature
1
d) The initial temperature of the lead is O'c. Use the graph to determine the local
energy supplied to the lead before it starts to mat. The specific heat capacity
of land is 130 J kg