### Specific Heat Pre-lab Assignment

In this experiment you will investigate the ideas of specific heat and latent heat. Specific heat comes into play when a substance is being heated or cooled, while latent heat is important when a substance changes phase.

1. Run the simulation, which shows five graphs. If heat is being added to a sample of water at a constant rate, which graph best represents the plot of temperature vs. time over a two-minute period? Note that each graph shows the sample, which is initially solid, starting at -10°C and taking 10 seconds to reach 0°C.

You may find the following data helpful when deciding which graph is correct:

Specific heats for water: cliquid = 1.0 cal/g °C and cice = csteam = 0.5 cal/g °C
Latent heats for water: heat of fusion Lf = 80 cal/g and heat of vaporization Lv = 540 cal/g

Circle the correct graph below.

 Graph 1 Graph 2 Graph 3 Graph 4 Graph 5

2. If heat is being added to the sample at a constant rate of 90 cal/s, what is the mass of the sample?