Which of these has a standard enthalpy of formation of zero? | StemPy Lab

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Which of these has a standard enthalpy of formation of zero? | StemPy Lab

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Which of these has a standard enthalpy of formation of zero?

ChemistryEasyHigh School (11–12)Chemical Thermodynamics › Enthalpy and Hess's Law

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Which of these has a standard enthalpy of formation of zero?

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← Dissolving some calcium chloride makes 90.0 g of solution in a foam cup get hotter by 2.5 K. If its specific heat capacity is 4.2 J g⁻¹K⁻¹, what heat did the solution absorb?Given Δf Hᵒᵐⁱⁿᵘˢ of C₂H₄(g) = +52.3 kJ/mol and of C₂H₆(g) = -84.7 kJ/mol, find Δr Hᵒᵐⁱⁿᵘˢ for C₂H₄(g) + H₂(g) → C₂H₆(g). →

More onChemical Thermodynamics › Enthalpy and Hess's Law

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