Determining the enthalpy change for the thermal decomposition of potassium hydrogen carbonate into potassium carbonate. Controlled Variables: 1. Volume of HCl ± 0.5 cm3 (± 2%) 2. Concentration of HCl‚ 3. Same mass of K2CO3 and KHCO3 within specified ranges of 2.5 – 3.0g and 3.25 – 3.75g respectively 4. Same calorimeter used i.e. polystyrene cup is used in this experiment 5. Same thermometer will be used ± 0.10K 6. Same source of K2CO3‚ KHCO3 and HCl Raw Data Results: The raw
Premium Thermodynamics Enthalpy Energy
Heat resistance of endospores of Bacillus pumilus Abstract Spore suspension of Bacillus pumilus was inoculated into universal bottles containing sterile distilled water in water baths at temperatures of 85°C‚ 90°C and 95°C. At specific time intervals‚ a sample was removed and spread on nutrient agar plates. The number of colonies formed was used to determine the D-value and z-value. The D-value for 85°C is 64.1 minutes‚ 25.7 minutes for 90°C and 8.2 minutes for 95°C while the z-value is 11
Premium Heat Bacillus Bacteria
EXPERIMENT #1: Representing Systems and Models: The Tea Lab HOMEWORK QUESTIONS: 1) An open system exchanges matter and energy with its surroundings. A closed system exchanges energy but no matter with its environment. An isolated system exchanges neither matter nor energy with its environment. Isolated systems do not exist naturally though it is possible to think of the entire universe. The tea system is an open system because it exchanges energy (heat) with its air/surroundings. 2)
Premium Measurement Entropy Thermodynamics
While working in the Financial Aid field I have had the privilege of working with a number of different individuals of diverse backgrounds. I have come across people from all walks of life‚ including those with severe disabilities‚ individuals with limited resources‚ and even individuals with different cultural and ethical backgrounds. Each encounter has been unique in its own way with learning experiences that I have carried with me through my years of employment. Additionally when growing up I
Free Knowledge Learning Person
My topic is about using bubble wrap to save the energy! Staying energy efficient is crucial in saving money. When I moved into my first house on campus‚ I was very shocked at the first heating bill. Soon after‚ I decided to find ways to lower my energy bill‚ through means of energy efficiency. After learning about energy efficiency in class‚ I learned that big portion of energy is consumed by space heating. So I insulated my windows with bubble wrap. I recently received my next heating bill to see
Premium Energy Heat Thermodynamics
Using Charles’ Law to Determine Absolute Zero Background Info It is noticed that in this lab‚ as the temperature of the water in the beaker is increased‚ the distance between the pipette and water plug increases. When this distance increases‚ the volume of trapped gas also increases. This relates to Charles’ Law as it shows that the volume of a gas is positively proportional to temperature. Theoretically‚ absolute zero is the lowest possible temperature‚ where all molecules have the least possible
Premium Temperature Energy Length
Tayler Orth October 20‚ 2013 HS100 Introduction to Health Science Unit 9 Seminar Assignment Learning to be attentive at work. Your behavior at work should be one of attentiveness. To begin with‚ you need to be a good listener. Make sure you understand what is being said and what is being asked. When you take the wrong instructions you make the unit you are working for inefficient. Attend to details. Make sure every work
Premium Energy If You Have to Ask Thermodynamics
The list is near endless when it comes to how physics can affect our daily life. For example‚ just walking is a part of physics in our daily life. Here is a list of some of the ways physics touches our daily life: 1. Motion can be explained using physics as part of the laws ofmechanics and thermodynamics. 2. When we eat‚ we convert food to mechanical energy. While this is aphysics concept‚ eating is also chemistry because the food is digested under a chemical reaction that is then able
Premium Personal life Thermodynamics Automobile
Results/CalculationsAlcohol Average Temperature Change (°C) Average Change in Mass of Burner (g) Propanol 14 0.4392 Butanol 12 0.4176 Pentanol13.95 0.4810 Hexanol12.2 0.3448 Table 4: Shows the average temperature change and the average change in mass of burner for each of the fuels. The averages were based on five trials. PropanolTheoretical Heat of Reaction: Bonds Broken Bonds Formed Type of Bond Bond Energy (KJ/mole) Number of Bonds Total (KJ/mole) Type of Bond Bond Energy (KJ/mole) Number
Premium Energy Thermodynamics Enthalpy
To investigate the relationship between surface area : volume ratio and heat loss. INTRODUCTION: The aim of this experiment is to investigate and find the relationship between heat loss (of water) and surface area to volume ratio of animals. To investigate this‚ we are going to use three flasks of different volume (as the equivalent the animals) and thus different surface areas filled with water. BACKGROUND: Surface Area : Volume Ratios We will be using the following formula for calculating
Premium Thermodynamics Heat Temperature