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34. The phase changes B C and D - E are not associated with temperature increases...
34. The phase changes B-C and D - E are not associated with temperature increases because...
34. The phase changes B-C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas liquid and gas TOC solid and liquid liquid B solid Heat added (1) 35. Which of these is a weak base? A) NaOH B) HCI E) CH3CH2OH C) Naci D) NH 36. When discussing energy...
32. A solvent has a pure vapor pressure of 160.0 torr at room temperature. 0.50 mol...
32. A solvent has a pure vapor pressure of 160.0 torr at room temperature. 0.50 mol of a nonvolatile solute is added to 5.50 mol of the solvent to form a solution. The vapor pressure of the liquid above this solution is A) 174.7 torr B) 13.4 torr C) 160 torr D) 146.7 torr 33. The following scheme depicts what type of chemical reaction? Page 5 » H-N-CH2N-H + n HOC(CH3COH - Adipic acid -CICH) cf. + 2 H20 Nylon...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran no ranom.don -- [ H-NCH27, N-H + 1 HOCCH27; COH Diamine Adipic acid tN(CH)N-C(CH2),C7,+ 2n H,O Nylon 6,6 A) Addition polymerization C) Condensation polymerization E) Elastomeric polymerization B) Acid-base reaction D) Ionic polymerization 34. The phase changes BC and D E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds...
9) An increase in the temperature of a solution usually A) increases the boiling point. B)...
9) An increase in the temperature of a solution usually A) increases the boiling point. B) increases the solubility of a gas in the solution. C) increases the solubility of a solid solute in the solution. D) decreases the solubility of a solid solute in the solution. E) decreases the solubility of a liquid solute in the solution. 10) The solubility of Kl is 50 g in 100 g of H20 at 20°C. If 110 grams of Kl are added...
Which of the following is incorrect? A. A change in phase is not accompanied by a...
Which of the following is incorrect? A. A change in phase is not accompanied by a change in temperature. B. Kinetic energy of a chemical system involves the energy of motion of atoms, ions, and molecules in the system. C. A bomb calorimeter measures heat exchange at constant volume. D. A substance in a solid state which changes directly to a gas has undergone a sublimation reaction. E. All of the above statements are correct.
4. The other phase change that can happen is liquid to gas. Similar to the phase...
4. The other phase change that can happen is liquid to gas. Similar to the phase change of solid to liquid, the temperature of the system does not change. All of the energy goes into the phase change. Only now instead of the latent heat of fusion, we have the latent heat of vaporization: Q = mly How much heat must be added to 3.8 kg (1 gallon) of water for half of it to be changed into gas? The...
4. The other phase change that can happen is liquid to gas. Similar to the phase...
4. The other phase change that can happen is liquid to gas. Similar to the phase change of solid to liquid, the temperature of the system does not change. All of the energy goes into the phase change. Only now instead of the latent heat of fusion, we have the latent heat of vaporization: Q = mL How much heat must be added to 3.8 kg (1 gallon) of water for half of it to be changed into gas? The...
As you increase the gas chromatography column temperature, analytes’ ______________ increases and stationary phase solubility _______________....
As you increase the gas chromatography column temperature, analytes’ ______________ increases and stationary phase solubility _______________. A) boiling point; increases B) vapor pressure; decreases C) vapor pressure; increases D) retention time; increases E) retention time; decreases
Which of the following changes would increase the vapor pressure of a liquid? i. An...
Which of the following changes would increase the vapor pressure of a liquid? i. An increase in temperature ii. An increase in the intermolecular forces in the liquid iii. An increase in the size of the open vessel containing the liquid a) i and ii only b) i and iii only c) i only d) ii only e) iii only If the rate of evaporation from the surface of a liquid exceeds...
1.A When a heating curve for a material going through phase change is graphed with temperature...
1.A When a heating curve for a material going through phase change is graphed with temperature on the x-axis, and heat added to the system on the y-axis, the phase change is clear because it has _______________ A) a horizontal slope B) a vertical slope C) an angled slope 1.B The strongest intermolecular forces in a sample of pure propane (CH3CH2CH3) are: A) Ion-Dipole Forces B) London Dispersion Forces C) Dipole-Dipole Forces D) Hydrogen Bonding 1.C Which chemical is expected...
34. The phase changes B-C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas liquid and gas TOC solid and liquid liquid B solid Heat added (1) 35. Which of these is a weak base? A) NaOH B) HCI E) CH3CH2OH C) Naci D) NH 36. When discussing energy...
32. A solvent has a pure vapor pressure of 160.0 torr at room temperature. 0.50 mol of a nonvolatile solute is added to 5.50 mol of the solvent to form a solution. The vapor pressure of the liquid above this solution is A) 174.7 torr B) 13.4 torr C) 160 torr D) 146.7 torr 33. The following scheme depicts what type of chemical reaction? Page 5 » H-N-CH2N-H + n HOC(CH3COH - Adipic acid -CICH) cf. + 2 H20 Nylon...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran no ranom.don -- [ H-NCH27, N-H + 1 HOCCH27; COH Diamine Adipic acid tN(CH)N-C(CH2),C7,+ 2n H,O Nylon 6,6 A) Addition polymerization C) Condensation polymerization E) Elastomeric polymerization B) Acid-base reaction D) Ionic polymerization 34. The phase changes BC and D E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds...
9) An increase in the temperature of a solution usually A) increases the boiling point. B) increases the solubility of a gas in the solution. C) increases the solubility of a solid solute in the solution. D) decreases the solubility of a solid solute in the solution. E) decreases the solubility of a liquid solute in the solution. 10) The solubility of Kl is 50 g in 100 g of H20 at 20°C. If 110 grams of Kl are added...
4. The other phase change that can happen is liquid to gas. Similar to the phase change of solid to liquid, the temperature of the system does not change. All of the energy goes into the phase change. Only now instead of the latent heat of fusion, we have the latent heat of vaporization: Q = mly How much heat must be added to 3.8 kg (1 gallon) of water for half of it to be changed into gas? The...
4. The other phase change that can happen is liquid to gas. Similar to the phase change of solid to liquid, the temperature of the system does not change. All of the energy goes into the phase change. Only now instead of the latent heat of fusion, we have the latent heat of vaporization: Q = mL How much heat must be added to 3.8 kg (1 gallon) of water for half of it to be changed into gas? The...
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