Endothermic

The passage on the body temperatures of the dinosaurs dictate that dinosaurs were endothermic animals. Three reasons are being given for this arguement: existence of dinosaur fossils in polar region, the leg position of the dinosaur and the haversian canals in the bone structure of the dinosaur. The fossils that have been founded in the polar region is being classified as a clear indicator for endothermy in dinosaurs. However, the lecturer confronts this point by highlighting the climate in the…

the difference between exothermic reactions and endothermic reactions. To write combustion as a word equation you would write ‘___ -> Oxygen = ___ Oxide’ so if the element you were burning was Iron, the product would be Iron Oxide. In a chemical reaction, the surroundings may increase or decrease in temperature due to exothermic and endothermic reactions. An exothermic reaction is where heat exits the reactant, causing it to cool down, and an endothermic reaction is where heat enters the…

C5H1205. When xylitol dissolves, it has an endothermic reaction, thus cooling the solution. Sorbitol is a sweet-tasting crystalline compound. Aspartame is a very sweet substance found in artificial sweeteners. Maltodextrin is a destrin containing maltose and is often a food additive produced by starch.…

Endothermy has a lot of benefits and costs compared to ectotherms. Endotherms depend on their bodies metabolism to produce enough heat to raise their body temperature. Endotherms balance heat production with heat loss. Each endotherm has a range of environmental temperatures that keeps its body stable and it does this by regulating the heat loss and heat production. They regulate their body heat by vaping their metabolic rate and change its rate of heat loss by adjusting their insulation.…

The values calculated through experimentally extrapolated values compare to the the expected theoretical values of these heats with a degree of error. In most cases the values found through experiment were higher than the expected value by one or two kilojoules. This discrepancy causes a 2-5% error in the values calculated. The causes of this degree of error could be sources of errors due to the equipment and set up of the experiment. The experiment is not a perfectly isolated system which could…

The compounds are held together through ionic bonds, but when they dissolve, ionic bonds are broken and ion dipole attractions form instead. This change in bonding indicates that there is a change in energy, which can create endothermic or exothermic reactions. Endothermic reactions are those when energy is drawn into the system in order to perform the reaction, while exothermic reactions are those when energy is released into the surroundings. Exothermic reactions are caused when the ionic…

and a certain amount of water. When you break the pack, the salt mixes with the water causing a reaction that either increases or decreases the temperature. When these salts dissolve in the water it creates a reaction that is either endothermic or exothermic. Endothermic is the absorption of heat. This is when the pack gets hotter. Exothermic is the release of heat. This is when the pack gets colder. The enthalpy of dissolution for these salts determines rather they can be used in the hot or…

Activity 2: Chemistry In a Bag With Chemistry In a Bag, students learn the difference between a physical change and a chemical change and how changes can either be endothermic or exothermic. Set-up: Each group of four students will need 1 canister filled with calcium chloride (CaCl2), 1 canister filled with sodium bicarbonate (NaHCO3), 1 dropper of phenol red, a set of measuring spoons, a measuring cup, a portion cup, four pairs of goggles and four sandwich bags. Make sure there are paper…

How the contents of instant cold packs help them work. 2. Instant hot and cold packs work by using chemicals that wither absorb a lot of heat quickly or release heat when absorbed in water, when a process absorbs a lot of heat it’s called an endothermic reaction ; when a process releases a lot of heat it’s called an exothermic reaction, the chemical ammonium nitrate Is quite often used in cold packs because it absorbs a lot of heat when soaked in water, water and…

reaction shifted to the right (products' side) and when the temperature was decreased, the reaction shifted to the left (reactants' side). With this evidence, one can conclude that the forward reaction was endothermic and this supports the Le Chatelier's Principle that states in an endothermic reaction the temperature increases the forward rate. 5. The addition of NaCl into the hydrated cobalt (II) ion equilibrium would increase the concentration of chloride ions and cause the formation of some…