# Ips 3.2 & 3.4

Topics: Temperature, Melting point, Fahrenheit Pages: 2 (682 words) Published: December 9, 2012
The purpose of experiments 3.2 and 3.4 was to determine whether the melting/freezing or boiling point is a characteristic of the property of the substance. A characteristic property is a certain property (physical or chemical) that can determine or identify the substance. For example, density and magnetism are two characteristic properties that can distinguish objects from one another. In this case, we are figuring out whether the melting/freezing or boiling point of a substance will help us find out what the substance is. For experiment 3.2, we recorded the temperature of water and a molten substance every half minute after it was melted. We stopped recording a little after the substance had froze. For experiment 3.4, we recorded the temperature of a given substance, every half minute after the substance began to boil, to find the boiling point. For both these experiments, I found out that the freezing and boiling points of a substance are characteristic properties. The freezing point was proved in experiment 3.2 and the boiling point was proved in experiment 3.4. I know that the freezing point of a substance is a characteristic property because substances that are the same with different masses or amounts, have the same boiling point. For example, people with a pink or orange test tube had the same substance, but with different amounts. They happened to come up with the range of freezing/melting point, 80 degrees Celsius. The people with a green or yellow test tube had the same substance, but also with different amounts. They all got around 53 degrees Celsius. This means that we can identify different substances from others by their freezing point, even if the mass is different. This is a characteristic property. I know that the boiling point is a characteristic because in the experiment, one group had 10 cm3 of substance A and got a boiling point of 80.5. Another group had 20 cm3 of substance A and got a boiling point of 80.6. It was about the same boiling...