Calculation Formulas Under Heat And Specific Heat Capacity Flashcards
(19 cards)
Basic Heat Transfer
Heat energy equals mass multiplied by specific heat capacity multiplied by the change in temperature.
Clues: Heat, mass, specific heat, temperature change.
Latent Heat (Phase Change)
Heat energy equals mass multiplied by latent heat.
Clues: Melting, boiling, condensation (no temp. change).
Thermal Equilibrium
Mass of the first substance multiplied by its specific heat capacity and the temperature difference equals the mass of the second substance multiplied by its specific heat capacity and its temperature difference.
m_1 c_1 \Delta T_1 = m_2 c_2 \Delta T_2
Clues: Two substances mixed, final temperature.
Combined Heating and Phase Change
Add the heat energy for temperature changes and phase changes.
Clues: Multi-stage heating (e.g., ice to water, steam to water).
Power and Time
Power equals heat energy divided by time.
Clues: Power in watts, time in seconds.
Heat Capacity
Heat energy equals heat capacity multiplied by the temperature change. Heat capacity equals mass multiplied by specific heat capacity.
Clues: Heat capacity instead of specific heat.
Efficiency and Energy Loss
Efficiency equals useful heat output divided by total heat input, multiplied by 100.
Clues: Efficiency, energy lost.
Calorimetry (Heat Exchange)
Heat gained by one substance equals heat lost by another substance.
Clues: Heat transfer in an insulated system.
Graphical Analysis - Slope of Graph
Specific heat capacity equals the slope of the heat versus temperature graph.
Clues: Heat vs. Temperature graph.
Graphical Analysis - Horizontal Line
Heat energy equals mass multiplied by latent heat.
Clues: Heat vs. Temperature graph.
Unit Conversion
Convert calories to joules by multiplying by 4.18. Convert kilograms to grams by multiplying by 1000.
Clues: Mixed units (e.g., g ↔ kg, °C ↔ K).
Heat Transfer Tip
Increase Temp? Use the appropriate formula.
Latent Heat Tip
Phase change? No temp. change!
Thermal Equilibrium Tip
Balance heat lost and gained.
Power-Time Tip
Find power, then divide or multiply by time.
Heat Capacity Tip
If heat capacity is given, skip specific heat.
Efficiency Formula
Efficiency = useful heat output / total heat input.
Multi-Stage Problems Tip
Break into heating/cooling and phase change.
Graphs Tip
Slope = specific heat capacity, Horizontal = heat energy equals mass multiplied by latent heat.
