Heterogeneous Catalyst: The Catalytic Converter Within the field of chemistry, catalysts are used to lower the activation energy (Ea) required in order to kick start a desired reaction. There are multiple ways scientists have been able to utilize this implementation into everyday life. There are three types of catalysts: heterogeneous and homogeneous catalysts as well as enzymes. The type of interest here is the heterogeneous catalyst. A heterogeneous catalyst is one that exists in a different phase as the reactants it is being introduced to. For example, a solid being introduced into a reaction that contains two different liquids and speeds up the reaction of those two liquids is considered a heterogeneous catalyst. A perfect example to evaluate in more depth is one that most of us use every single day. A catalytic converter is something that is required on the exhaust system of all present-day vehicles. It can be found attached to an exhaust pipe just as it comes out of the engine. Most common converters do exactly as the name refers, they catalyze chemical reactions that in short convert otherwise harmful chemicals to less harmful molecules to be released into the air. A typical converter consists of multiple sheets of platinum that carry out three important reactions. These platinum sheets act as heterogeneous catalysts in said reactions. Within the two primary reactions the catalyst is used as an oxidizing agent, adding oxygen to incoming molecules and releasing
List of Figures
1.1 High Risk Activity on Site
1.2 Excavating Foundation Trenches
1.3 Erecting Roof Trusses
1.4 Demolition of two existing buildings
I have been employed by AV Construction as a Site Agent. I am currently in charge of a small site which comprises of 12 semi-detached two storey dwellings. There are 4 sub-contractors from a demolition company that will be demolishing the two existing buildings on site,…
This file of RES 320 Week 3 Discussion Question 2 consists of:
How do you know that your experimental research results can be generalized to the population?
What is the best experimental design to test the effectiveness of a new weight loss drug?
Sociology - General Sociology
RES 320 Entire Course / Foundations of Research
RES/320 Entire Course / Foundations of Research
RES320 Entire Course / Foundations of Research
University of Phoenix
volume and angle measurement.
I.1 designs constructs various rectangles of a given perimeter using natural numbers.
--demonstrates concretely, pictorially, and symbolically that many rectangles are possible for a given perimeter (SS-I.2.6)
Foundation Words: Perimeter, Rectangle, Measure, Area
Objective: The students will learn how to measure perimeter of rectangles.
Method: Have students draw a rectangle in their notebooks (any size). Have them measure eac h side of their rectangles and…
PARRAMATTA MARIST HIGH SCHOOL
Yr 11 SOR MODULE 2 RUBRIC
Some eyecontact used; mainly refers
Stance may be inconsistent or
inappropriate to the presentation, may
use limited gestures.
Uses basic variety in tones within their
May use pause, voice projection and
stress in an attempt to engage the
Show selfdiscipline in their learning,
recognising the need to complete…
caffeine on brain development of a rat relative to that of adolescents.
2. The article states that they had a sample population of 28 male Sprague Dawley rats. The rats were 23- 25 days old; chosen at random.
3. The population could have consisted of male and female samples in order to better represent the broad teenager population.
4. Subjects were selected by their age. The rats had to be 23 to 25 days old with brain activity resembling the beginning of puberty in humans.
5. Yes there was a…
2. Listener Relevance Link: What can you do as individuals to help improve our ecosystem? You can become a volunteer at The Surfrider Foundation. 3. Speaker Credibility Link: I’ve taken it upon myself to join the The Surfrider Foundation and put effort into cleaning up our small community.(Visual aid) 4. Thesis Statement: My goal…
decline in the binge drinking practice, but it resurfaced to its previous rate from 2001 to the present time (Gealt, Gunter, Martin, O’Connell and Visher, 2010). This kind of activity, known as binge drinking, can be defined as the consumptions of five or more drinks in a row for a man and 4 or more drinks to a woman (Nemours Foundation, 2014).
A study conducted by the University of Delaware reveals alarming statistics about this habit (Gealt, Gunter, Martin, O’Connell and Visher, 2010). Statistics gathered…
hours together in schools, and therefore, schools are ideal environments for the promotion and establishment of healthy living in children. I believe that advocating for a healthy school community involves promoting: 1) healthy eating and 2) daily physical activity.
1. Healthy eating
A healthy diet during childhood supports optimal health, growth and cognitive development, as well as aid in the prevention of chronic illness later in life (Van Cauwenberghe et al., 2010). Because children spend…
What is the Early Years Foundation Stage ?
The Early years foundation stage (EYFS)framework is a set of guidelines, which determines that all early years providers must meet to ensure that children learn and develop well and are kept healthy and safe. From when your child is born up until the age of 5 the early years foundation stage should be happy, active, exciting, fun and secure: and support their development and learning needs. It helps all professionals working in the EYFS to help your child…
about asthma, cause of it and treatments for your child.
A. What is asthma?
1. Define asthma
2. Asthma is an issue in the US
3. Limited activities
4. Symptoms of asthma
B. Cause of asthma heredity, allergy, viruses, and environment
5. Nervous system
1. Quick-relief medications
2. Long-term control medications
3. Tracking asthma
The powerful of development…