Specific heat

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

The purpose of this lab was being able to use specific heat capacity to find out what the unknown metal was. If the specific heat capacity of the unknown metal is less than 1 Joule per degrees Celsius or Kelvin then the unknown metal is either aluminum, copper, lead, tin, or zinc. Procedure: First we had to plug in the hotplate and get about 200mL of water and put it in a beaker to boil. Then the mass of the unknown metal and the mass of the Styrofoam cup was recorded. After the water on the hotplate

Specific Heat Capacities of Metals Aim: The aim of this experiment is to determine the properties of two unknown metals by heating them up to their initial temperature and then determining their specific heat capacity by calculating the temperature difference once it reaches equilibrium with a room temperature water bath. Therefore comparing the two metals with their specific heat capacities on a known table and deducing the unknown metals. The water bath needs to be well insulated so that no heat

Aim: To determine the specific heat capacity of water by heating water and recording temperatures at regular intervals. Hypothesis: (i) P = Q /t (ii) Q = m c ΔT Where, P is the power of the heater Q is the total energy provided by the heater t is the total time for which the heater was used m is the mass of water c is the specific heat capacity of water, and ΔT is the change in temperature From (i) and (ii) m cΔT = P t ΔT = (P/mc) * t This is in the form y = mx +

Water Water has a high specific heat that keeps the temperature relatively constant. The specific heat of a substance is the amount of heat it takes to raise or lower the temperature of one gram by one calorie. Compared to other substances water has a relatively high specific heat and changes its temperature less frequently. Water molecules are polar, the electrons shared in the covalent bonds are not distributed equally throughout the molecule resulting in the oxygen region of the molecule having

tested the amount of change in heat given off during different chemical reactions. We created a calorimeter that we will use to test different reactions to see how the heat energy was affected. After completing the experiments we were able to tell what chemicals or metals would change the heat energy for every reaction we tested. Overall, this experiment showed us what characteristics of chemical reactions affect the change in temperature, enthalpy, and specific heat. Discussion of Results During

step back, this is mostly due to a chemical reaction that is known as the “specific heat”. This must be achieved (as well as the other two properties that every fire is required to possess in order to burn) in order for a flame to become present. After this specific heat is reached, a chemical reaction occurs and turns the fuel source of the fire into a vapor. The aspects that are required for a flame to be created are a heat source, some sort of fuel, as well as some sort of oxidizing agent. The only

John Yu Meyer AP Chem 9 October, 2016 In this experiment, hot water was mixed with room temperature water in a calorimeter to calculate the specific heat capacity of the calorimeter. The specific heat of the calorimeter was then used to find the enthalpy of sodium hydroxide and hydrochloric acid, ammonia and hydrochloric acid, and ammonium chloride and sodium hydroxide by mixing each, respectively, into the beaker after each other. The beaker was washed with distilled water after each reaction

water and its importance 3. High specific heat capacity The amount of heat required to raise the temperature of 1 g of water by 1oC Water has a high specific heat capacity A lot of energy is required to increase the temperature of water to 1oC due to the hydrogen bonds ~ heat must be absorbed in order to break hydrogen bonds & heat is released when hydrogen bonds form. Learning Outcomes : (b) Describe the properties of water and its importance 3. High specific heat capacity Water provides a very

every 10C below optimum temperature, the rate of successive substrate-enzyme collisions decreases by 2 to 3 times [Campbell and Reece, p862]. High specific heat capacity also benefits marine environments by resisting temperature fluctuations, which is perhaps why marine food chains are often many times longer than those of terrestrial organisms. The high heat capacity of water is one of several hydrogen-bonding attributes that benefit the marine environments, unsurprisingly, with the high surface tension