INTRODUCTION Given appropriate chemicals and equipment‚ the specific heat capacity and molar mass of a metal‚ enthalpy of neutralization of an acid and base‚ and the enthalpy of solution of an unknown salt can be determined by following specific procedures. All of these procedures require the use of a calorimeter‚ which are of two types: a bomb calorimeter and a coffee cup calorimeter. Calorimeters are simply devices used to measure the amount of heat gained or lost in a system. Although this
Premium Thermodynamics Energy Enthalpy
Calculating the Enthalpy Change of Reaction for the Displacement Reaction between Zinc and Aqueous Copper Sulphate Data Collection and Processing Observations: * Drops of water left on the inside of the measuring cylinder * Hole in the lid‚ possible escape route for gas or splash-back * The polystyrene cup felt warm during the reaction By extrapolating the graph we can estimate what the rise in temperature would have been if the reaction had taken place instantaneously. I can
Premium Thermodynamics Measurement Energy
Molecular Mass Changes in Heat Combustion of an Alcohol Planning Introduction ============ As alcohol burns in air it gives out energy as heat and light. I am going to investigate how the energy output of an alcohol in combustion changes‚ with increased relative molecular mass‚ or RMM. RMM is the sum of the atomic masses of every atom in the molecule. Using the alcohols: Methanol‚ Ethanol‚ Propan-1-ol‚ Butan-1-ol and Pentan-1-ol‚ I will plan‚ and complete an experiment that tests
Premium
loss from the hot water from combining it with the cold water. As discussed in a page titled Heat Capacity2‚ the heat capacity is defined as the amount of heat it takes to raise the temperature of a substance by one degree (in this case C). In the experiment performed in lab‚ the heat capacity of the calorimeters was calculated by subtracting the heat gain from the heat loss and then dividing that by the difference in the temperatures between cold water and the combination of the hot and cold water
Premium Temperature Thermodynamics Enthalpy
1. INTRODUCTION Have you been to the gas station this week? Considering that we live in a very mobile society‚ it ’s probably safe to assume that you have. While pumping gas‚ you ’ve undoubtedly noticed how much the price of gas has soared in recent years. Gasoline which has been the main source of fuel for the history of cars‚ is becoming more and more expensive and impractical (especially from an environmental standpoint). These factors are leading car manufacturers to develop cars
Premium Internal combustion engine Automobile
Combustion of Gummy Bears Energy is a concept.� Most definitions of the word energy fail to provide its exact meaning when applied to scientific matters.� In science the word energy is a concept that expresses two measurable properties‚ heat and work.� Here is the relationship of energy‚ heat and work: Energy Released=Work Done + Heat Released The Law of Conservation of Energy‚ derived from centuries of observation and measurement‚ indicates that energy cannot be created or destroyed. But energy
Premium Bear Polar bear Arctic
fuel saving techniques employed by drivers. "You can do a lot as far as saving fuel is concerned by taking certain steps‚" said Devendra‚ an auto expert. He advised that air filter should should be cleaned regularly for better flow of air into the combustion chamber for igniting the fuel better. "This step can easily save fuel‚" he added. Similarly‚ owners should go for regular cleaning of fuel filter for a proficient compel. He‚ however‚ admitted that vehicle owners have now become more aware as far
Premium Internal combustion engine Petroleum
Calorimetry Experiment Purpose: The objective of this lab is to determine the enthalpy change for NaOH(aq) + HCl(aq) NaCl (aq) + H2O(l) Procedure: Before measuring the enthalpy of acid base neutralization‚ my partner Brian and I determined a calorimeter constant‚ using a homemade polystyrene calorimeter. With the following formula and data: qhot= cm (Tf-Ti) qcold=cm(Tf-Ti) SYSTEM DATA SURROUNDINGS DATA Water cold Mass: 50mL Water hot Mass: 50mL C=4.18 C=4.18 Ti=20 C Ti=31
Premium Sodium hydroxide Chlorine Calorimetry
EXPERIMENT 1: REACTIONS OF ENOLATE IONS WITH CARBONYL GROUPS Aims In this experiment we used two techniques for the reactions of enolate ions with carbonyl groups. One technique used was Doebner reaction and the other technique used was Claisen-Schmidt reaction. Therefore the aim of this experiment is to synthesize trans p-methoxycinnamic acid and to synthesize dibenzalacetone via an aldol condensation reaction between acetone and benzaldehyde. The products would be recrystallized using ethanol
Premium Carbonyl Organic chemistry Aldol condensation
conduct the experiment. 25 ml of The Bar Vodka was used and 7 ml of distillate was collected before a temperature of 95 degrees Celsius was reached. Collected distillate was then subjected to a flammability test to confirm ethanol content. The percent ethanol was computed to be 24%. Introduction Distillation is a method of separation for homogenous mixtures‚ which are composed of both volatile and nonvolatile substances [1]. It involves the volatile substance to undergo a phase change from a liquid
Premium Distillation Boiling point Ethanol