Does decreasing pressure decrease entropy? For gases and most liquids, (∂V∂T)p>0, so indeed the entropy decreases as pressure increases. How does pressure affect enthalpy and entropy? 1 Answer. Enthalpy is the heat content of a system as a function of entropy and pressure. As the pressure increases ( ΔP>0 ), so does enthalpy, and vice […]

Why does rate of reaction decrease over time? Typically, reaction rates decrease with time because reactant concentrations decrease as reactants are converted to products. Reaction rates generally increase when reactant concentrations are increased. Why does the rate of the reaction decrease over time quizlet? Why does the rate of reactants decrease over time? The concentration […]

What four 4 rocks are usually changed by contact metamorphism? Contact metamorphism produces non-foliated (rocks without any cleavage ) rocks such as marble, quartzite, and hornfels. In the diagram above magma has pushed its way into layers of limestone, quartz sandstone and shale. What is it called when rocks change from one type to another? […]

What are two atoms called when they have the same atomic number but a different mass number? Two atoms with the same atomic number, but different mass numbers (same number of protons, different number of neutrons), are called isotopes, or isotopic nuclides. Having different numbers of neutrons changes the mass of these atoms, so isotopes […]

Is biting an apple a chemical or physical change? The chemical reaction is called “oxidation”, and the enzyme that regulates oxidation in apples is called “polyphenol oxidase” (PPO), also known as “tyrosinase”. example if they are dropped, bitten, or cut, many of the cell walls inside the apple get broken. Is chewing a physical or […]

Which element is most likely to form a cation? Halogens always form anions, alkali metals and alkaline earth metals always form cations. Most other metals form cations (e.g. iron, silver, nickel), whilst most other nonmetals typically form anions (e.g. oxygen, carbon, sulfur). What element group is least likely to form ions? Noble Gases Which of […]

In which reproductive parts of a flower pollen grains are found? Stamen, the male reproductive part of a flower. In all but a few extant angiosperms, the stamen consists of a long slender stalk, the filament, with a two-lobed anther at the tip. The anther consists of four saclike structures (microsporangia) that produce pollen for […]

What are the earliest adhesives? The earliest known use of adhesives was discovered in central Italy when two stone flakes partially covered with birch-bark tar and a third uncovered stone from the Middle Pleistocene era (circa 200,000 years ago) were found. This is thought to be the oldest discovered human use of tar-hafted stones. How […]

Which is not an official SI unit? Volume. Litre (L) and millilitre (mL) are non-SI units, but because they are easier to write and pronounce, they are in common use. Which of the following units is not a SI unit? The kelvin scale of temperature is also known as the absolute scale and the thermodynamic […]

How is viscosity used in everyday life? Water has a low or “thin” viscosity, for example, while honey has a “thick” or high viscosity. The law of viscosity has important uses in such areas as inkjet printing, protein formulations and injections, and even food and beverage manufacturing. What are the uses of viscosity? Viscosity measurements […]