Heat is the ... transferred from hot objects to cold objects. (a) force (b) power (c) energy. One kcal is the amount of heat needed to increase the temperature of 1 kg of water. (a... Heat is the ... transferred from hot objects to cold objects. (a) force (b) power (c) energy. One kcal is the amount of heat needed to increase the temperature of 1 kg of water. (a) one degree °C (b) from 14.5 °C to 15.5 °C (c) from 63 °F to 64 °F. The unit of the latent heat is ....
Understand the Problem
The question presents multiple-choice items related to the concepts of heat and energy in the context of thermodynamics, asking for the correct options regarding the nature of heat transfer and the definition of kilocalories.
Answer
Heat is energy. One kcal raises 1 kg of water from 14.5°C to 15.5°C. Latent heat unit is J/kg.
Heat is the energy transferred from hot objects to cold objects. One kcal is the amount of heat needed to increase the temperature of 1 kg of water from 14.5 °C to 15.5 °C. The unit of latent heat is joules per kilogram (J/kg).
Answer for screen readers
Heat is the energy transferred from hot objects to cold objects. One kcal is the amount of heat needed to increase the temperature of 1 kg of water from 14.5 °C to 15.5 °C. The unit of latent heat is joules per kilogram (J/kg).
More Information
Heat, as a form of energy, always flows from a warmer object to a cooler one. The kilocalorie is defined specifically for water under its properties.
Tips
A common mistake is confusing energy with power or force. Remember, energy is transferred, and power is the rate at which energy is transferred.
Sources
- Heat - Purdue University - chemed.chem.purdue.edu
- Specific Heat Calculator - omnicalculator.com
- 1.4 Heat Transfer, Specific Heat, and Calorimetry - OpenStax - openstax.org
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