The salts will be dissolved in distilled water by small quantities until the reaction reaches When ionic compounds dissolve in water, they either absorb energy from or release energy to the surroundings. If a chemical reaction absorbs heat from the surroundings, it is an endothermic reaction. If a solution releases heat to its surroundings, it is an exothermic reaction. The enthalpy of dissolution is the enthalpy change associated with the dissolution of a substance in a solvent at a constant pressure. The change in enthalpy relies on the concentration of the salt solution, because different concentrations will produce different enthalpies.
Unit 2: The Physiology of Fitness Assignment: No 1 Task 1.a Task1b Musculoskeletal response Increased blood supply The short term effects of exercise on your muscles include an increase in temperature and metabolic activity. Result: - greater demand for oxygen in blood supply through capillary dilation. Increase in muscle pliability When you warm up your muscles during activity makes them more pliable and reduces the risk of injury. Increased range of movement The short-term effect of exercise are demonstrated by changes within the joint. Movement of joints stimulates the secretion of synovial fluid.
“Fibers that cannot be digested by bacteria in the large intestines are called insoluble fibers because they do not dissolve in water.” (Grosvenor & Smolin, 2006) High fiber diets can produce many benefits, including higher nutrient absorption levels, and better waste output. Diets that tend to lack in fiber or are high in insoluble fiber tend to cause gastrointestinal irritation and constipation. People that experience these symptoms should consider reviewing their fiber sources, and water consumption
I’m going to infer that Styrofoam will make the better calorimeter. For our insulator, Styrofoam will work better because it again has a lower specific heat capacity. Note, heat given off by a reaction in the coffee cup is absorbed by the water in the coffee cup therefore the heat capacity of a coffee cup calorimeter is that of water the water (q-reaction=m-water x C-water x (t,f-t,i). In order to determine the best calorimeter we must use the Calorimeter Constant: C-calorimeter= q-calorimeter/∆T This helps us determine the heat energy required to raise the temperature of the calorimeter by 1.00 C. For this experiment
A) is neutralized by water B) is surrounded by water molecules C) reacts and forms a covalent bond to water D) aggregates with other molecules or ions to form a micelle in water Answer: B Page Ref: Section 3 11 9) Which would you expect to be most soluble in water? A) I B) II C) III D) IV Answer: A Page Ref: Section 3 10) Solutes diffuse more slowly in cytoplasm than in water because of A) the higher viscosity of water. B) the higher heat of vaporization of water. C) the presence of many crowded molecules in the cytoplasm. D) the absence of charged molecules inside cells.
There are two kinds of minerals, macro-minerals and trace minerals. The human body needs large amounts of macro-minerals, these minerals include magnesium, sodium, calcium, phosphorus, potassium, and chloride. We need just small amounts of trace minerals, which include copper, iodine, fluoride, zinc, iron and selenium. Minerals help with forming bones and teeth, they protect cells from damage, Iron helps the red blood cells deliver oxygen to body tissues, minerals keep the muscle function and nerve function working normal and they keep the right amount of water in the different parts of your body. Minerals come from soil and cannot be made by our bodies.
Considering the fact that substances have differences, the specific heat varies depending on what substance is being heated. Calorimetry is performed with a calorimeter. These can be intricate and expensive devices, but in this lab, two Styrofoam cups are used. The purpose of this experiment is to calculate the specific heat of a foreign metal. To do this, the metal will be heated, and then put into water to determine the heat transferred.
Another solvent used is ethyl acetate; the resultant decaffeinated coffee is marketed as "natural decaf" because ethyl acetate is naturally present in fruit. Extraction with supercritical carbon dioxide has also been employed. Decaffeinated coffee usually loses some flavor compared to normal coffee. There are also coffee alternatives that resemble coffee in taste but contain no caffeine. These are available both in ground form for brewing and in instant form.
When it rains, tiny raindrops are formed. The raindrops dissolve carbon dioxide gases in the air and form a weak carbonic acid. The raindrops then seep into the ground. The groundwater eats away at the calcite in the earth. Calcite is the main mineral in limestone rock.
When acid rain falls, it sometimes raises the levels of acids in certain soils, removing nutrients from the soil that helps plants grow. Because the nutrients are removed from the soil, it makes it hard for plants and trees to resist diseases, insect infestation and bad weather. Acid rain also raises the acidity of steams, rivers, and lakes, which can harm and sometimes kill life in the water. The acids in acid rain also react with the CaCO3 in marble and limestone, which can cause damage to statues and buildings. Lakes with limestone beds are less affected by acid rain because the limestone reacts with the acids in acid rain.