Which processes have the ΔsystemS less than zero? a) Melting of gallium b) Dissolving of salt...
Which processes have the ΔsystemS less than zero?
a) Melting of gallium
b) Dissolving of salt in water
c) Decomposition of hydrogen peroxide to oxygen and water
d) Formation of AL2O3 from its stable elements
Homework Answers
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Which processes have the ΔsystemS less than zero?
a) Melting of gallium
b) Dissolving of salt...
Which of the following is TRUE regarding dissolving a salt in water? a) The boiling point...
Which of the following is TRUE regarding dissolving a salt in water? a) The boiling point of the solution is lower than that of pure water. b) The freezing point of the solution is higher than that of pure water. c) The vapor pressure of a solution of NaCl will be higher than that of a solution of CaCl2. d) The osmotic pressure will increase as the molarity of the solution increases. e) All of these are true.
. 1. Is the melting point of substance A (a) greater than, (b) less than or...
.
1. Is the melting point of substance A (a) greater than, (b)
less than or (c) equal to the
melting point of substance B?
Explain your reasoning.
2. Is the specific heat of substance A in its solid state (a)
greater than, less than, or (c)
equal to the specific heat of substance B in its solid
state?
Explain your reasoning.
3. Is the latent heat of fusion of substance A (a) greater than,
(b) less than or (c)...
For which of the following processes would ∆S be negative? (a) the melting of ice (b)...
For which of the following processes would ∆S be negative? (a) the melting of ice (b) the freezing of water (c) the evaporation of a liquid (d) the breakup of a large molecule into smaller molecules(e) these all have positive ∆S values Which of the following reactions would have a negative ∆S°? (a) H2(g) → 2 H(g) (b) H2(l) → H2(g) (c) H2(g) + Cl2(g) → 2 HCl(g) (d) 2 H2(g) + CO(g) → CH3OH(g)(e) none of the above Please...
answer 1-4 Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The...
answer 1-4
Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The attraction of the water to the ions in NaCl is through dipole-dipole IFs. Water is considered the solute and NaCl the solvent. The partially positive oxygen in water is attracted to the chloride ion. d. The process of separating the sodium ions from the chloride ions is endothermic. All of these statements are true. polar For the following solution, describe the deviation with respect...
7. When a metal and a salt react to produce a new metal and a new...
7. When a metal and a salt react to produce a new metal and a new salt, the reaction is one of a) b) c) d) simple decomposition double displacement direct combination displacement Which of the following is the formula for iodic acid? a. HI b) HIO c) HIO, d) H.IO 9. Which of the following is characteristic of a base in solution? a) b) c) d) has a soapy feel has a sour taste turns blue litmus red forms...
49) Regarding sea level, melting ice and global climate, which are true? Melting sea ice can increase the albedo of the earth, causing a net cooling. a) Global sea level has been more or less s...
49) Regarding sea level, melting ice and global climate, which are true? Melting sea ice can increase the albedo of the earth, causing a net cooling. a) Global sea level has been more or less stable for the last 6,000 years, but has been rising b) in recent times. c) Sea level rise is mostly due to the thermal expansion of water as it is heated. d) Choices A and B are true. e) Choices B and C are true....
72. Hydrogen peroxide is a very common oxidizing agent. It has been used as an oxidizer...
72. Hydrogen peroxide is a very common oxidizing agent. It has been used as an oxidizer for rocket engines, it is a readily available antiseptic for home use and we have used it several times in the general chemistry lab. Below is some thermodynamic data for hydrogen peroxide xide at 25 C H (kJ/mol AG (k.J/mol Chemical Thermodvnamics of hydrogen 188 266 H20:1) H2(g) 02(g) H:0:(1) 20H(g H2O2(g) → 20H(g) H202(g) HO:(g) +H(g) H2O2(l) H2O(l)+%O2(g) 120 188 174 332 365...
7. Why is RNA less stable than DNA? b) it is subject to hydrolysis at high...
7. Why is RNA less stable than DNA? b) it is subject to hydrolysis at high pH a) it is subject to hydrolysis at low pH it is subject to degradation by nucleases d) both a and c are reasons e) both b and c are reasons 8. Which of the following are NOT types of DNA damage? a) deamination b) depurination c) oxidative damage e) depyrimidination d) alkylation 9. What is the role of restriction endonucleases in molecular cloning?...
1. Which of the following processes are spontaneous or non-spontaneous? a. 2 H2(g) + O2(g) → 2 H 0(2) b. Recharging a b...
1. Which of the following processes are spontaneous or non-spontaneous? a. 2 H2(g) + O2(g) → 2 H 0(2) b. Recharging a battery without plugging it in. C. Salt dissolving in water d. Freezing a popsicle at room temperature 2. For the following equilibrium constant values, indicate whether the process is spontaneous or nonspontaneous AND whether the value of ArxnGº is greater than less than or equal to zero by circling the appropriate response. Equilibrium Constant Value Is the reaction...
Which of the following statements is true? A. Neutrons are less massive than electrons. O B....
Which of the following statements is true? A. Neutrons are less massive than electrons. O B. Protons and electrons have equal but opposite charges. O C. Wavelength multiplied by frequency equals half the speed of light. O D. Mercury is a solid at standard temperature and pressure. O E. Water is more dense as a solid than as a liquid. What is the mass percent of hydrogen for C&H,OH? O A. 13.6% OB. 12.2% C. 20.8% D. 16.6% E. 18.8%
.
1. Is the melting point of substance A (a) greater than, (b)
less than or (c) equal to the
melting point of substance B?
Explain your reasoning.
2. Is the specific heat of substance A in its solid state (a)
greater than, less than, or (c)
equal to the specific heat of substance B in its solid
state?
Explain your reasoning.
3. Is the latent heat of fusion of substance A (a) greater than,
(b) less than or (c)...
answer 1-4
Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The attraction of the water to the ions in NaCl is through dipole-dipole IFs. Water is considered the solute and NaCl the solvent. The partially positive oxygen in water is attracted to the chloride ion. d. The process of separating the sodium ions from the chloride ions is endothermic. All of these statements are true. polar For the following solution, describe the deviation with respect...
7. When a metal and a salt react to produce a new metal and a new salt, the reaction is one of a) b) c) d) simple decomposition double displacement direct combination displacement Which of the following is the formula for iodic acid? a. HI b) HIO c) HIO, d) H.IO 9. Which of the following is characteristic of a base in solution? a) b) c) d) has a soapy feel has a sour taste turns blue litmus red forms...
49) Regarding sea level, melting ice and global climate, which are true? Melting sea ice can increase the albedo of the earth, causing a net cooling. a) Global sea level has been more or less stable for the last 6,000 years, but has been rising b) in recent times. c) Sea level rise is mostly due to the thermal expansion of water as it is heated. d) Choices A and B are true. e) Choices B and C are true....
72. Hydrogen peroxide is a very common oxidizing agent. It has been used as an oxidizer for rocket engines, it is a readily available antiseptic for home use and we have used it several times in the general chemistry lab. Below is some thermodynamic data for hydrogen peroxide xide at 25 C H (kJ/mol AG (k.J/mol Chemical Thermodvnamics of hydrogen 188 266 H20:1) H2(g) 02(g) H:0:(1) 20H(g H2O2(g) → 20H(g) H202(g) HO:(g) +H(g) H2O2(l) H2O(l)+%O2(g) 120 188 174 332 365...
7. Why is RNA less stable than DNA? b) it is subject to hydrolysis at high pH a) it is subject to hydrolysis at low pH it is subject to degradation by nucleases d) both a and c are reasons e) both b and c are reasons 8. Which of the following are NOT types of DNA damage? a) deamination b) depurination c) oxidative damage e) depyrimidination d) alkylation 9. What is the role of restriction endonucleases in molecular cloning?...
1. Which of the following processes are spontaneous or non-spontaneous? a. 2 H2(g) + O2(g) → 2 H 0(2) b. Recharging a battery without plugging it in. C. Salt dissolving in water d. Freezing a popsicle at room temperature 2. For the following equilibrium constant values, indicate whether the process is spontaneous or nonspontaneous AND whether the value of ArxnGº is greater than less than or equal to zero by circling the appropriate response. Equilibrium Constant Value Is the reaction...
Which of the following statements is true? A. Neutrons are less massive than electrons. O B. Protons and electrons have equal but opposite charges. O C. Wavelength multiplied by frequency equals half the speed of light. O D. Mercury is a solid at standard temperature and pressure. O E. Water is more dense as a solid than as a liquid. What is the mass percent of hydrogen for C&H,OH? O A. 13.6% OB. 12.2% C. 20.8% D. 16.6% E. 18.8%
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