- 1(current)
Q. No.The heat capacity of a system is defined as:
| 1. | The heat required to raise the temperature of the system by 1 degree Celsius. |
| 2. | The heat released when the system undergoes a chemical reaction. |
| 3. | The heat absorbed when the system undergoes a chemical reaction. |
| 4. | The heat required to raise the temperature of the system by 1 Kelvin. |
Subtopic: Calorimetry |
69%
Level 2: 60%+
Hints
Which of the following statements about exothermic reactions is true?
1. They absorb heat from the surroundings
2. They have a positive change in enthalpy \((\Delta \mathrm{H})\)
3. They release heat to the surroundings
4. They occur spontaneously at low temperatures
1. They absorb heat from the surroundings
2. They have a positive change in enthalpy \((\Delta \mathrm{H})\)
3. They release heat to the surroundings
4. They occur spontaneously at low temperatures
Subtopic: Calorimetry |
83%
Level 1: 80%+
Hints
2. Heat released when a gas condenses to form a liquid
3. Heat absorbed when a liquid vaporizes to form a gas
4. Heat released when a liquid solidifies to form a solid
Subtopic: Calorimetry |
85%
Level 1: 80%+
Hints
Hess's law states that:
| 1. | The heat evolved in a given process is equal to the heat absorbed in the reverse process. |
| 2. | The heat evolved or absorbed in a chemical process is the same regardless of the pathway taken. |
| 3. | The heat of reaction depends on the temperature of the reaction. |
| 4. | The heat of reaction is directly proportional to the concentration of the reactants. |
Subtopic: Calorimetry |
71%
Level 2: 60%+
Hints
What is the heat of neutralization for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?
| 1. | -57.32 kJ/mol | 2. | -13.7 kJ/mol |
| 3. | -57.32 kJ/g | 4. | -13.7 kJ/g |
Subtopic: Calorimetry |
78%
Level 2: 60%+
Hints
Subtopic: Calorimetry |
85%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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