Linked from

The 53 pages that link to First law of thermodynamics, each with the reason it gives.

• ThermodynamicsRelated: It formalizes conservation of energy in thermodynamic transformations.

• Conservation of energyRelated: It expresses energy conservation for systems that exchange heat and work.

• Gibbs free energyNarrower topic: It underlies the energy accounting from which enthalpy and Gibbs free energy are constructed.

• Second law of thermodynamicsCompared with: Energy conservation alone permits transformations that the second law rules out.

• EnthalpyNarrower topic: It relates enthalpy changes to heat while accounting for work.

• Specific heat capacityRelated: Heat supplied to a sample changes its internal energy, often observed as a temperature rise.

• Heat capacityRelated: It distinguishes heat supplied from the portion that changes a system's internal energy.

• Adiabatic processRelated: With heat transfer set to zero, the first law directly relates internal energy to work.

• Carnot cycleRelated: It relates the cycle's net work to the heat absorbed and rejected.

• JouleRelated: Its energy balance expresses heat and work in the same unit.

• CalorimetryNarrower topic: Calorimetric heat measurements apply energy conservation to the sample and its surroundings.

• Internal energyRelated: It relates internal-energy changes to heat transfer and work.

• EnergyRelated: It expresses energy conservation for thermodynamic systems.

• Thermal efficiencyRelated: It accounts for how supplied heat is divided between work and energy leaving the system.

• Joule–Thomson effectNarrower topic: It explains how an insulated throttle can preserve enthalpy despite a pressure drop.

• Thermodynamic cycleRelated: It accounts for the balance between net heat and net work over a complete cycle.

• Heat engineRelated: It accounts for the heat input as work output plus rejected heat over a complete cycle.

• Brayton cycleRelated: Energy balances determine the cycle’s heat input, rejected heat, and net work.

• Chemical thermodynamicsNarrower topic: It constrains the heat and work exchanged during chemical changes.

• Isothermal processRelated: It determines how heat transfer balances work during an isothermal change.

• Carnot's theoremRelated: Energy accounting links an engine’s heat input, rejected heat, and work output.

• Free energyCompared with: Energy conservation alone does not tell how much energy can perform useful work.

• Otto cycleNarrower topic: It accounts for the heat and work exchanged during each cycle process.

• Rudolf ClausiusRelated: Clausius's work combined energy conservation with a separate constraint on which processes can occur.

• ExergyRelated: Exergy analysis supplements energy conservation by tracking energy quality.

• James Prescott JouleNarrower topic: Joule’s measurements helped establish the law’s equivalence of heat and work.

• Third law of thermodynamicsCompared with: Energy conservation does not determine the entropy reference fixed by the third law.

• Refrigeration cycleNarrower topic: It accounts for heat removed, heat rejected, and work supplied across the cycle.

• Thermodynamic processRelated: It relates energy transfers to the change between endpoint states.

• Zeroth law of thermodynamicsCompared with: Unlike the zeroth law, it concerns energy accounting rather than equilibrium-based temperature.

• Diesel cycleRelated: It provides the energy balance for heat input, rejected heat, and work.

• Isolated systemRelated: In an isolated system, its energy balance has no heat or work transfer terms.

• Reynolds transport theoremRelated: Using energy as the extensive property gives open-system energy balances.

• Thermodynamic efficiencyRelated: Energy balances identify the input, useful output, and losses used to calculate efficiency.

• Caloric theoryRelated: The first law accounts for heat and work as energy transfers rather than caloric quantities.

• Chemical energyRelated: Chemical reactions redistribute energy rather than create or destroy it.

• Perpetual motionRelated: It rules out a machine that produces work without drawing energy from somewhere.

• Perpetual motion machineRelated: A machine producing work without an energy input would violate energy conservation.

• CogenerationRelated: It frames cogeneration as recovering energy flows, not creating extra energy.

• Equilibrium thermodynamicsRelated: It constrains energy changes between equilibrium states without specifying a process's detailed dynamics.

• Fundamental thermodynamic relationNarrower topic: The relation gives the first law a state-variable form for reversible changes.

• Clausius theoremRelated: Energy conservation alone does not impose the theorem’s inequality.

• Gibbs–Helmholtz equationNarrower topic: It underlies the energy accounting that defines enthalpy.

• Isentropic processRelated: It relates work and heat to energy changes along an isentropic path.

• ThermochemistryNarrower topic: It constrains the heat and work accompanying every thermochemical process.

• Endothermic processNarrower topic: Absorbed heat changes the system’s energy rather than creating energy.

• Energy conversion efficiencyRelated: It requires accounting for all input energy, including energy that does not become useful output.

• Stirling cycleRelated: It accounts for energy entering, leaving, and being stored across each process.

• Exothermic processNarrower topic: It explains how released heat fits into the system’s overall energy balance.

• History of thermodynamicsBroader topic: It formalized the conversion between heat and work developed through nineteenth-century experiments.