The Effect Of Heat Capacity Of Water

The dependent variable in the experiment was the temperature and energy absorbed by the water.

In this experiment, the results of the tested materials gave off heat and the change in the temperature was positive because when one substance was added to another the temperature increased. A calorimetric constant is required because the calorimeter that was made is different for every lab group.

4.Calculate the heat absorbed or released per gram of solute added to the water (in joules/g) record in data table 2. Calculate the average heat per gram by averaging trials 1 and 2.

In order to measure the heats of reactions, add the reactants into the calorimeter and measure the difference between the initial and final temperature. The temperature difference helps us calculate the heat released or absorbed by the reaction. The equation for calorimetry is q=mc(ΔT). ΔT is the temperature change, m is the mass, c is the specific heat capacity of the solution, and q is the heat transfer. Given that the experiment is operated under constant pressure in the lab, the temperature change is due to the enthalpy of the reaction, therefore the heat of the reaction can be calculated.

You have the mass of water from calculation #9, the specific heat of water is 4.184 J/g(oC), and the temperature change of water

2. How did concentration and/or volume differences affect the heat change (q) for each trial?

Abstract: This experiment introduced the student to lab techniques and measurements. It started with measuring length. An example of this would be the length of a nickel, which is 2cm. The next part of the experiment was measuring temperature. I found that water boils around 95ºC at 6600ft. Ice also has a significant effect on the temperature of water from the tap. Ice dropped the temperature about 15ºC. Volumetric measurements were the basis of the 3rd part of the experiment. It was displayed during this experiment that a pipet holds about 4mL and that there are approximately 27 drops/mL from a short stem pipet. Part 4 introduced the student to measuring

If 10.0g of solid baking soda is poured into 30 mL of citric acid, then a reaction will occur and an increase in temperature will be observed. Whereas, if a piece of magnesium metal is added to 30 mL of Hydrochloric Acid, then a reaction will occur and an increase in temperature will be observable. For Part 3 of the experiment, if 50 mL of tap water is placed in a can 2.5 cm inches above a burning marshmallow, then through the process of calorimetry the energy content of the marshmallow should be 5.0kJ/g (the value provided by the United States Department of Agriculture).

16. Use the equation: q = m(SH)ΔT to solve for the amount of heat gained by the water from metal. You have

In this experiment, we investigate the change in temperature caused by adding a chemical substance into the water and dissolving it. The results recorded in the table below show that our hypothesis is correct.

Procedures: We set up an appropriate apparatus including a Styrofoam calorimeter cup containing room temperature deionized water, two thermometers, and a clean beaker also containing deionized water directly on a heat source. After heating up the water until its boiling point, we recorded the mass of each metal and carefully placed the selected metal inside the boiling water until the temperature of the water containing the metal was constant. Quickly, we placed the hot metal from the boiling water in the calorimeter cup containing room temperature water

In an article called “Heat Transfer by conduction” by Mike Brown, it states “Thermal energy in the vibrating particles or molecules is passed on to nearby particles in a process called conduction”. This explains to us the process of conduction in which it relates to our design because when we insert the thermometer into the warm water, our goal is to keep the water warm with our cup so that once the thermometer makes DIRECT contact with the warm water, it will heat up the thermometer and give us an exact temperature.

Thermocouples measure the temperature from a thermoelectric effect which produces the temperature based on the voltage generated whereas the thermometer measure temperature by expanding or contracting with the temperature change. In addition to that, the thermometer is only used to measure the temperature of liquids. 2. A) When the hot metal was placed in the Styrofoam cup with the water, an endothermic reaction took place because the water was absorbing the heat released by the metal when placed in the water. The temperature of water before adding the metal was 23 degrees Celsius and when the metal was added it went to 25 degrees Celsius which means that the heat absorbed by the water made the temperature of the water rise.

Introduction: The purpose of this experiment was to examine the relationship between heat transfer, temperature, and specific heat capacity of water and a metal. Prior to beginning the experiment, it was known that specific heat is the amount of heat needed to raise the temperature of a given sample of substance one degree Celsius, and specific heat capacity is amount of heat needed to raise temperature of one kilogram of substance one degree Celsius. The formula to solve for specific heat capacity is: Cp = Q/ (m *ΔT) or Specific heat capacity =

We will be using 6 different fuels to heat up 100ml of water, and find out the changes of the temperature. We will measure the temperatures of the water before and after the experiment. We will burn heat the water for exactly 2 minutes, and check the changes in temperature. The change in temperature will allow us to work out the energy given off the fuel by using this formula: