Termokimia

Apa yang didefinisikan sebagai fokus perhatian ketika mempelajari perubahan energi selama reaksi?

• lingkungan sekitar

• lingkungan

• system

• alam semesta

Jenis sistem manakah yang memungkinkan pertukaran energi tetapi tidak terjadi pertukaran materi dengan lingkungan

• Open system

• Closed system

• Isolated system

• Adiabatic system

Dalam reaksi eksoterm, bagaimana hubungan antara entalpi produk dan entalpi reaktan?

• Enthalpy of products is greater than enthalpy of reactants.

• Enthalpy of products is less than enthalpy of reactants.

• Enthalpy of products is equal to enthalpy of reactants.

• Enthalpy of products is unrelated to enthalpy of reactants.

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What happens to the value of ΔH when a thermochemical equation is reversed?

• It remains the same.

• It changes its sign.

• It is multiplied by -1.

• It is divided by 2.