Contact for further consultation
Principles of
Chemistry - Midterms
& Finals
Comprehensive
Questions (Frequently
Tested) with Verified
Answers Graded A+
1/
25
, Contact for further consultation
1. An bond is a strong electrostatic force of
attraction between cations and anions in an ionic compound.
Answer: Ionic
2. The is a negatively charged, subatomic particle of
relatively low mass located outside the nucleus. Answer: Electron
3. Gases can undergo large changes
as pressure changes. Answer: Volume
4. What is the term used to describe the point at which temperature
and pres- sure above which a gas cannot be condensed into a liquid?
Answer: Critical Point
5. The melting point of H2O(s) is 0 °C. Would you expect the melting
point of H2S(s) to be −85 °C, 0 °C, or 185 °C? Explain your answer.
Answer: −85 °C. Water has stronger hydrogen bonds, so it melts at a higher
temperature.
6. What is the boiling point of Neon? Answer: -245.9 °C
7. What device is used to measure the amount of heat absorbed or
released in a chemical or physical process? Answer: Calorimeter
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25
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8. How much heat, in joules and in calories, is required to heat a
28.4-g (1-oz) ice cube from −23.0 °C to −1.0 °C? Answer: 1310 J; 313 Cal
9. A 45-g aluminum spoon (specific heat 0.88 J/g °C) at 24 °C is
placed in 180 mL (180 g) of coffee at 85 °C and the temperature of
the two become equal. What is the final temperature when the two
become equal? Assume that coffee has the same specific heat as
water. Answer: 82 °C
10. Which law states that the volume of a gas at constant
temperature and pressure is proportional to the number of gas
molecules? Answer: Avogadro's law
11. The pressure of the atmosphere on the surface of the planet
Venus is about
88.8 atm. Compare that pressure in psi to the normal pressure on earth
at sea level in psi. Which of the following would be correct? Answer: Earth
Answer: 14.7 lb in-2; Venus Answer: 1.30 × 103 lb in−2
12. A typical barometric pressure in Kansas City is 740 torr. What is
this pressure in atmospheres, in millimeters of mercury, and in
kilopascals? Answer: 1. 101.3 kPa
2/
25
Principles of
Chemistry - Midterms
& Finals
Comprehensive
Questions (Frequently
Tested) with Verified
Answers Graded A+
1/
25
, Contact for further consultation
1. An bond is a strong electrostatic force of
attraction between cations and anions in an ionic compound.
Answer: Ionic
2. The is a negatively charged, subatomic particle of
relatively low mass located outside the nucleus. Answer: Electron
3. Gases can undergo large changes
as pressure changes. Answer: Volume
4. What is the term used to describe the point at which temperature
and pres- sure above which a gas cannot be condensed into a liquid?
Answer: Critical Point
5. The melting point of H2O(s) is 0 °C. Would you expect the melting
point of H2S(s) to be −85 °C, 0 °C, or 185 °C? Explain your answer.
Answer: −85 °C. Water has stronger hydrogen bonds, so it melts at a higher
temperature.
6. What is the boiling point of Neon? Answer: -245.9 °C
7. What device is used to measure the amount of heat absorbed or
released in a chemical or physical process? Answer: Calorimeter
1/
25
, Contact for further consultation
8. How much heat, in joules and in calories, is required to heat a
28.4-g (1-oz) ice cube from −23.0 °C to −1.0 °C? Answer: 1310 J; 313 Cal
9. A 45-g aluminum spoon (specific heat 0.88 J/g °C) at 24 °C is
placed in 180 mL (180 g) of coffee at 85 °C and the temperature of
the two become equal. What is the final temperature when the two
become equal? Assume that coffee has the same specific heat as
water. Answer: 82 °C
10. Which law states that the volume of a gas at constant
temperature and pressure is proportional to the number of gas
molecules? Answer: Avogadro's law
11. The pressure of the atmosphere on the surface of the planet
Venus is about
88.8 atm. Compare that pressure in psi to the normal pressure on earth
at sea level in psi. Which of the following would be correct? Answer: Earth
Answer: 14.7 lb in-2; Venus Answer: 1.30 × 103 lb in−2
12. A typical barometric pressure in Kansas City is 740 torr. What is
this pressure in atmospheres, in millimeters of mercury, and in
kilopascals? Answer: 1. 101.3 kPa
2/
25
