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(a)
Interpretation:
The effect of intermolecular forces on rate of evaporation has to be explained.
Concept introduction:
- Evaporation is a phenomenon applicable to liquids. It is defined as the transition from liquid phase to vapor phase in liquids. This transition occurs either by spontaneously without any external energy or in the presence of external energy. The rate of evaporation is affected by various factors.
- Intermolecular force is defined as the interactions between the components of a substance. The strength of interaction depends upon the type of components.
- If the components are ions of unlike charges, as in the case of ionic compounds, the interaction is quite strong which is called electrostatic force of attraction.
- When the components are non-polar neutral molecules, as in the case of covalent compounds, the intermolecular forces present are Van der Waals forces and London dispersion forces.
- When the components are of polar nature as in the case of polar covalent compounds, there can be hydrogen bonding, dipole-dipole forces acting between them.
- Each of these forces is not of equal strength. Thus different compounds have different kind of intermolecular forces and hence different properties.
(b)
Interpretation:
The effect of temperature on rate of evaporation has to be explained.
Concept introduction:
Temperature is measure of average kinetic energy possessed by the molecules. Thus, temperature of a substance implies the average kinetic energy possessed by its molecules. Temperature is measured in different scales like Celsius, Kelvin or Fahrenheit. If the freezing point of water is said to be
(c)
Interpretation:
The effect surface area on rate of evaporation has to be explained.
Concept introduction:
Surface area is the region corresponding to the surface of the molecules. It is associated with the size of the molecules. If the size is large, surface area is high. Molecules with high surface area get more exposure to surroundings.
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Chapter 9 Solutions
Chemistry: An Atoms First Approach
- Part C IN H N. Br₂ (2 equiv.) AlBr3 Draw the molecule on the canvas by choosing buttons from the Tools (for bonds and + e (×) H± 12D T EXP. L CONT. דarrow_forward9. OA. Rank the expected boiling points of the compounds shown below from highest to lowest. Place your answer appropriately in the box. Only the answer in the box will be graded. (3) points) OH OH بر بد بدید 2 3arrow_forwardThere is an instrument in Johnson 334 that measures total-reflectance x-ray fluorescence (TXRF) to do elemental analysis (i.e., determine what elements are present in a sample). A researcher is preparing a to measure calcium content in a series of well water samples by TXRF with an internal standard of vanadium (atomic symbol: V). She has prepared a series of standard solutions to ensure a linear instrument response over the expected Ca concentration range of 40-80 ppm. The concentrations of Ca and V (ppm) and the instrument response (peak area, arbitrary units) are shown below. Also included is a sample spectrum. Equation 1 describes the response factor, K, relating the analyte signal (SA) and the standard signal (SIS) to their respective concentrations (CA and CIS). Ca, ppm V, ppm SCa, arb. units SV, arb. units 20.0 10.0 14375.11 14261.02 40.0 10.0 36182.15 17997.10 60.0 10.0 39275.74 12988.01 80.0 10.0 57530.75 14268.54 100.0…arrow_forward
- A mixture of 0.568 M H₂O, 0.438 M Cl₂O, and 0.710 M HClO are enclosed in a vessel at 25 °C. H₂O(g) + C₁₂O(g) = 2 HOCl(g) K = 0.0900 at 25°C с Calculate the equilibrium concentrations of each gas at 25 °C. [H₂O]= [C₁₂O]= [HOCI]= M Σ Marrow_forwardWhat units (if any) does the response factor (K) have? Does the response factor (K) depend upon how the concentration is expressed (e.g. molarity, ppm, ppb, etc.)?arrow_forwardProvide the structure, circle or draw, of the monomeric unit found in the biological polymeric materials given below. HO OH amylose OH OH 행 3 HO cellulose OH OH OH Ho HOarrow_forward
- OA. For the structure shown, rank the bond lengths (labeled a, b and c) from shortest to longest. Place your answer in the box. Only the answer in the box will be graded. (2 points) H -CH3 THe b Нarrow_forwardDon't used hand raitingarrow_forwardQuizzes - Gen Organic & Biological Che... ☆ myd21.lcc.edu + O G screenshot on mac - Google Search savings hulu youtube google disney+ HBO zlib Homework Hel...s | bartleby cell bio book Yuzu Reader: Chemistry G periodic table - Google Search b Home | bartleby 0:33:26 remaining CHEM 120 Chapter 5_Quiz 3 Page 1: 1 > 2 > 3 > 6 ¦ 5 > 4 > 7 ¦ 1 1 10 8 ¦ 9 a ¦ -- Quiz Information silicon-27 A doctor gives a patient 0.01 mC i of beta radiation. How many beta particles would the patient receive in I minute? (1 Ci = 3.7 x 10 10 d/s) Question 5 (1 point) Saved Listen 2.22 x 107 222 x 108 3.7 x 108 2.22 x 108 none of the above Question 6 (1 point) Listen The recommended dosage of 1-131 for a test is 4.2 μCi per kg of body mass. How many millicuries should be given to a 55 kg patient? (1 mCi = 1000 μСi)? 230 mCiarrow_forward
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