Question
Which units express heat capacity?
J/°C, J/K, cal/°C, cal/K
J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)
J/°C, J/K, cal/°C, cal/K
J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)
Answers
GPT-4o mini
Heat capacity is a measure of the amount of heat energy required to change the temperature of a substance. It is typically expressed in units of energy per degree of temperature change. The units commonly used to express heat capacity include:
1. **J/°C** (Joules per degree Celsius)
2. **J/K** (Joules per Kelvin)
3. **cal/°C** (calories per degree Celsius)
4. **cal/K** (calories per Kelvin)
These units are interchangeable when considering heat capacity, as a change in temperature of 1°C is equivalent to a change of 1K.
The units of heat capacity that include mass, such as:
- **J/(g·°C)**
- **J/(g·K)**
- **cal/(g·°C)**
- **cal/(g·K)**
These are specific heat capacities, which refer to the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius (or Kelvin).
In summary, both sets of units are valid; the first set represents total heat capacity, while the second set represents specific heat capacity.
1. **J/°C** (Joules per degree Celsius)
2. **J/K** (Joules per Kelvin)
3. **cal/°C** (calories per degree Celsius)
4. **cal/K** (calories per Kelvin)
These units are interchangeable when considering heat capacity, as a change in temperature of 1°C is equivalent to a change of 1K.
The units of heat capacity that include mass, such as:
- **J/(g·°C)**
- **J/(g·K)**
- **cal/(g·°C)**
- **cal/(g·K)**
These are specific heat capacities, which refer to the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius (or Kelvin).
In summary, both sets of units are valid; the first set represents total heat capacity, while the second set represents specific heat capacity.