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Is wood a sublimatory substance?
No. A sublimatory substance changes from the solid phase directly to the gas phase without passing through a liquid phase. Two examples are dry ice (solid CO2) and iodine.
What two factors determine if a substance will be a liquid?
The temperature of the environment and the melting and evaporation temperature of the substance.
What is a colloidal salt?
1) A colloidal system consists of two separate phases: a dispersed phase (or internal phase) and a continuous phase (or dispersion medium) in which the colloid is dispersed.2) A colloid is a substance microscopically dispersed evenly throughout another substance.
How does chromatography separate molecules?
The principle is based on equilibrium of the molecules between the mobile phase and the stationary phase. This will vary depending on the polarity of the substance, and the two phases. If the substance in more soluble in the mobile phase, it will travel further, and vice versa.
Is it true melting is considered an sublimation change because energy is gained by substance as it changes stae?
Melting is a phase change in which a substance changes from the solid state to the liquid state. Sublimation is a phase change in which a solid moves directly into the gas phase. Both melting and sublimation are two types of physical change.
The phase of matter depends on what?
Heat and pressure are the two main factors that determine a substance's current phase.With high heat a substance's phase drifts toward the gaseous phase while freezing temperatures cause it to move toward its solid phase. With pressure it is the opposite. Higher pressures push the substance toward its solid phase, while lower pressures will encourage the substance to evaporate into its gaseous phase.
What two factors determine the point which a liquid will boil?
(Explanation): phase diagrams are all about showing what phase a substance will be at at different temperatures and pressures. This is because these are the only two factors that affect it. Therefore, pressure and temperature are the two factors that determine the boiling point.
What are two physical changes that cooling a hot substance may result in?
The substance could liquefy or solidify. Cooling a gas: change from the gas phase to the liquid phase Cooling a liquid: change from the liquid phase to the solid phase
Is wood a sublimatory substance?
No. A sublimatory substance changes from the solid phase directly to the gas phase without passing through a liquid phase. Two examples are dry ice (solid CO2) and iodine.
What two determine the state of a substance?
Temperature and pressure
What are the two parameters that are necessary to determine probabilities for a particular normal distribution curve?
Mean and Standard Deviation
What two factors determine if a substance will be a liquid?
The temperature of the environment and the melting and evaporation temperature of the substance.
What are the 3 phaes for Mesothelioma Clinical Trials?
In phase one the dosage and safety of a drug is determined. In phase two they determine how effective the drug is on the targeted illness. In phase three they determine how effective the drug is compared to other drugs.
What is a colloidal salt?
1) A colloidal system consists of two separate phases: a dispersed phase (or internal phase) and a continuous phase (or dispersion medium) in which the colloid is dispersed.2) A colloid is a substance microscopically dispersed evenly throughout another substance.
What are two factors that determine the thermal energy of a substance?
Its mass and and its chemical composition.
What are the parameters in two phase flow?
pressure drops, void fraction, slip, hold up, velocity, conentrations, shape,size and density of the particles. etc.....
What are two physical changes that cooling a hot substance may resuit in?
Reduction in volume, phase change.
