Home/Basic Physics/Thermodynamics/First law of thermodynamics15. ThermodynamicsFirst law of thermodynamicsIn 15. ThermodynamicsFormulaCopy LaTeXΔU=Q−W\Delta U=Q-WΔU=Q−WTagsenergyphysicsphysics formulathermodynamicsDetailThe change in internal energy is the heat absorbed minus the work done by the system.Explore the ideaExplore the ideaFound an error? Contact us.Related formulasRelatedInternal energy of a monatomic ideal gasU=32nRTU=\frac32nRTU=23nRTOpen formulaOpen in sectionRelatedThermodynamic workW=∫ViVfP dVW=\int_{V_i}^{V_f}P\,dVW=∫ViVfPdVOpen formulaOpen in sectionRelatedIsothermal process of an ideal gasPV=constantePV=\text{constante}PV=constanteOpen formulaOpen in section