Calcolatore Energia Libera di Gibbs

Calcola l'energia libera di Gibbs per determinare la spontaneità di una reazione.

g
J/(g·K)
K

Heat (q)

2,092.0 J

Heat2.092 kJ

Heat (q) vs Mass of Solution/Substance

Vedi formula →

Formula

Calorimetry

Formula

q = m × c × ΔT

Where:

  • q = heat absorbed or released (J)
  • m = mass (g)
  • c = specific heat capacity (J/(g·K))
  • ΔT = temperature change (K or °C)

    • Positive q means heat absorbed (endothermic). Negative q means heat released (exothermic).

    Esempio Risolto

    100 g of water (c = 4.184 J/(g·K)) rises by 5 K.

    1. 01q = m × c × ΔT
    2. 02q = 100 × 4.184 × 5
    3. 03q = 2092 J
    4. 04q = 2.092 kJ

    Domande Frequenti

    What is calorimetry?

    Calorimetry is the measurement of heat changes during chemical or physical processes using a device called a calorimeter.

    Why use water in a calorimeter?

    Water has a high specific heat (4.184 J/(g·K)), making it good at absorbing heat. Its properties are also well characterized.

    What is the difference between q and ΔH?

    At constant pressure, q = ΔH. In a bomb calorimeter (constant volume), q = ΔU (internal energy change), which differs slightly from ΔH.

    Impara

    Understanding Molarity

    Calcolatrici Correlate

    Enthalpy Change Calculator

    Calculate ΔH from enthalpies of formation.

    Heat of Reaction Calculator

    Calculate heat of reaction per mole.

    Bond Energy Calculator

    Estimate ΔH from bond energies.