Data Record your data either in your lab notebook or in the space below.
Aluminum
Copper
Iron
Lead
m
mobile
Mass of metal g)
Mass of calorimeter (no lid) g)
Mass of calorimeter (no lid) + water (g)
m
Mass of water g)
(Subtract masses above.)
100.0
100.0
100.0
Initial temperature of metal (°C)
100.0
Initial temperature of water (°C)
Final temperature of both (°C)
AT water (C)
(Final - Initial)
ATmetal (°C)
(Final - Initial)
Specific heat of metal, Cmetal

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

The number at the end of an isotope’s name is the number.

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.