Specific Heat Lab

For q, you found how much heat was gained by the water so you know that same amount of heat was lost by the metal. Therefore, qmetal = -qwater. The mass of the sample was recorded from the baggie. The temperature change

The purpose of this experiment was to find, compare, and contrast the mass, volume, and densities of copper and zinc pennies. Information about the pennies was acquired before the start of the lab. The pre-lab research stated that any pennies that were minted before 1982 are composed of pure copper, while any pennies after 1982 are made out of zinc. The densities of copper -- 8.96 grams per centimeters cubed -- and zinc -- 7.13 grams per centimeters cubed -- were also information that was acquired before starting the experiment. With knowing the density of the two metals, this hypothesis was formed: If the mass and volume of pennies made out of zinc and copper are both measured, then the copper pennies will have a greater mass, because copper has a greater density than zinc. This hypothesis was formed because density equals mass over volume and if the mass is greater in an object that has the same volume, then the density of the object will be greater than the other.

Is this reaction endothermic or exothermic? What does that mean and how do you know? (~3 sentences)

Hypothesis: If we use these materials and use magnets, water, burners, and filters on the mixtures and elements given we should determine what kind of effect these materials given will have on these mixtures and elements, physical or chemical.

To ensure this was accurate, a trial was performed with two samples of the unknown metal, and the density was measured to be 8.68 g/mL. The density of metal #8 was not specific enough, due to the similar, but not identical, results. Also many elements are in the range from 8.2 g/mL to 9.1 g/mL. However, because metal #8 was not magnetic, we ruled out the possibility that it could be any of the ferromagnetic metals, like iron, nickel, or cobalt. The metals that remained were copper, with a density of 8.96 g/mL, bismuth (9.75 g/mL), manganese, which measured to be 7.44 g/mL, and tin, at 7.31 g/mL. The last property we tested for was specific heat. 0.374 J/(g*C)ended up being the specific heat of metal #8.

Purpose: The purpose of this experiment is to observe the temperature of ice and water during the constant addition of heat. Also, to use logger pro probes and software to collect and analyze the data. Lastly, observe graphically the temperature data as the ice melts, water warms then boils.

Cold Working Lab Report Name Institution Table of Contents Abstract 3 Introduction 3 Experimental Procedure 4 Results 4 Discussion 6 Conclusion 6 Acknowledgement 6 Cold Working Lab Report Abstract The goal of this experiment was to establish and compare the material hardness versus % of cold work for 110 copper alloy copper and 260 cartridge brass. The aim was to predict the material that would almost satisfy the requirements of a Rockwell hardness of 40 HRB for a component. From the experiment, the thickness, average HRB, and percentage cold work were tabulated for both copper and brass.

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

Our task was to identify the powder in each bag containing different amounts of moles. The mole provides a standard unit of measure that can be used to compare a wide variety of substances. A mole of atoms gives you a physical representation of what a single atom. The molar mass is the total mass of an element divided by one mole in that element. The molar mass can be used as a physical property to identify unknowns by converting it to moles and seeing which one is the closest to the moles in the bag. Our guiding question to answer was: “What are the identities of the unknown compounds?”

Introduction Calorimetry is to capture energy; you can find both joules and calories from it. This experiment is to show which type would capture energy the best. You will need to know the specific heat of water, as well as the equations to preform this expirement. Purpose

Objective: The objective of this experiment was to discover the specific heat of an unknown metal. By heating a metal then placing it in a calorimeter and taking the temperature of the solution as the heat transfer from the metal to the solution. This is done using a calorimeter, thermometer, 2 200mm test tube, an unknown metal, hot plate, 2 50ml graduated cylinders, sodium hydroxide, and hydrochloric acid. The techniques that are used in this experiment is cleaning glassware, disposing of chemicals, measuring mass, transferring solids, transferring liquids and solutions, heating liquids and solutions, and measuring the volume of solutions by examining the meniscus. Introduction: Chemical reactions always exerts some form of thermal energy, that energy then applies changes to its reactants, this is called Calorimetry which is the analysis of temperature change or heat change within a chemical reaction.

The experimental value is found to be 0.4 J/g°C, which is close enough to identify the metal as solid cobalt. In the third part, a new calorimeter was assembled and a new specific capacity

The heat of light lab is used to test the temperature of the shades of light in order to understand whether the different shades have different temperatures. As for the purpose of figuring out whether the different shades of light have different temperatures there are many. One of which is so you can determine what temperature is ideal for household items like lightbulbs, or when taking photos. In addition another reason for this lab was to introduce concepts of light in order to have a better understanding of it. Though pertaining to experience this lab was used to introduce students to the lab process, and the tools needed for labs.

Calorimetry is the science of measuring the change in heat absorbed or released during a chemical reaction. The change in heat can tell us if the reaction is either exothermic - it released or heat into surroundings, or endothermic - it absorbed heat from surroundings. The device used to measure calorimetry is a calorimeter. A calorimeter can range from very expensive lab ones to coffee styrofoam cups but they are all tightly sealed in order to prevent heat from escaping.

When heat is added to a substance, the kinetic energy of individual particles increases, which makes them move faster resulting in a increase in temperature. The more heat that is added per gram of substance, the greater the temperature change. The relationship between the heat added, the mass of a substance, and the temperature change it undergoes is known as the specific heat.