Name: 6.03: Calorimetry Data and Observations: Part I: Insert a complete data table, including appropriate significant figures and units, in the space below. Also include any observations that you made over the course of part I. (4 points) I observed that when the metal is placed inside the calorimeter, it transfers heat to the water making the water increase temperature while the metal will decrease temperature. I also noticed that the system was the metal and the surroundings is the water, this is because the water is taking in the heat from the metal making the water warm. Metal Name Mass of Metal Volume of water Initial temp.
Coal hypothesis = Coal will contaminate the water source making it more acidic. 2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this. a. Pyrite hypothesis accept/reject = Accept, because the pH level did rise within the 48 hour period during the experiment.
He placed the his temperature scale at o degree for the boiling point, and ent downward and placed the freezing point at 100 degrees 10. What did the physicist Amonton contribute to the understanding of hot and cold? Amonton was doing heating, and cooling experiments. He saw that when he cooled the object that when the temp dropped so did the pressure. So he thought what would happen if you kept pushing the pressure back.
Different compounds boil at different temperatures because each has a different, characteristic vapor pressure: compounds with higher vapor pressures will boil at lower temperatures. Boiling points are usually measured by recording the boiling point (or boiling range) on a thermometer while performing a distillation. This method is used whenever there is enough of the compound to perform a distillation. The distillation method of
Tammy Thanaporn Amornkasemwong 1st September 2011 Science Period 8 Introduction: How much energy can be released from fuels? Combustion is the process of burning fuel in order to produce heat. The intention of this experiment is to find whether different fuels produce different amount of energy. In the process of combustion in this experiment, cheeto, half a cashew nut, wax candle and ethanol are used as fuels combust with lighter, as heat and oxygen. When the fuels combust, oxygen and fuels react, and heat released.
The heat obtained when a known mass of alcohol or paraffin wax burns will be used to warm a measured volume of water. Enthalpy change can be defined as the amount of heat released or absorbed when a chemical reaction occurs at constant pressure. In an exothermic reaction, such as the case in this experiment, the following reaction takes place: H = H(products) - H(reactants) = negative (-ve) Specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius. The relationship between heat and temperature change is usually expressed, where c is the specific heat. The relationship does not apply if a phase change is encountered, because heat added or removed during a phase change does not change the temperature.
* Explain the air plasma cutting procedure. * List the advantage and disadvantages of using a air plasma cutting torch 3.0 INTRODUCTIONS Plasma is an ionized gas that conducts electricity. Plasma is created by adding energy to an electrically neutral gas. In this case, the gas is compressed air and the energy is electricity. The more electrical energy added, the hotter the plasma arc becomes.
The issue that the relationship between human activity and climate change is increasing concerned. Climate change is probably the greatest threat to global ecosystem. Climate is the average weather and influencing by slow changes in features like the ocean, the land and the orbit of the earth about the sun. Attribution to natural and human factors, human activity, to some extent, plays an important role in climate change (UNEPWMO, 2004, P5). This essay clarifies several parts: how human activity influences the climate change, the role of human activity, the impact of natural events.
In environmentalist Bill McKibben’s 2008 article, “Civilization Last Chance,” we are warned that we are in a state of emergency time we have little to save our environment from the danger. The current status of our earth is in danger, and people don’t seem to realize the serious consequence for the future. Robert W. Christopherson’s textbook, Geosystems, is an introduction to physical geography with scientific evidence. The current edition of Geosystems introduces the consensus science regarding human-created climate change. The high content of carbon causes global warming and global warming causes climate change.
Is climate change a myth or a fact? The earth is warming up! Scientists, meteorologists and climate experts have been advising the public of global warming and the effects it would bring to the planet. How is this change affecting the Earth? Global warming is when the earth heats up (the temperature rises).