Bates Carroll
09/13/2023 · High School

Qual a variação da entropia padrão, \( \Delta_{r} S^{\circ} \), da reação: \[ \begin{array}{l}\mathrm{H}_{2(g)}+\mathrm{I}_{2(g)} \rightarrow 2 \mathrm{HI}_{(\mathrm{g})} \\ \text { à } 25^{\circ} \mathrm{C} \text {, sabendo que nessa temperatura, as entropias padrão são: } \\ \mathrm{H}_{2(g)}=31,2 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1} ; \mathrm{I}_{2(g)}=27,9 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1} ; \mathrm{HI}_{(g)}=49,3 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\end{array} \]

UpStudy ThothAI Solution

Tutor-Verified Answer

Step-by-step Solution

Para encontrar a variação da entropia padrão, \( \Delta_{r} S^{\circ} \), da reação dada, podemos usar a fórmula: \[ \Delta_{r} S^{\circ} = \sum S_{\text{produtos}}^{\circ} - \sum S_{\text{reagentes}}^{\circ} \] Onde: - \( \Delta_{r} S^{\circ} \) é a variação da entropia padrão da reação. - \( S_{\text{produtos}}^{\circ} \) é a entropia padrão dos produtos. - \( S_{\text{reagentes}}^{\circ} \) é a entropia padrão dos reagentes. Dadas as entropias padrão dos reagentes e produtos: - \( S_{\text{H}_{2(g)}}^{\circ} = 31,2 \, \text{J} \, \text{mol}^{-1} \, \text{K}^{-1} \) - \( S_{\text{I}_{2(g)}}^{\circ} = 27,9 \, \text{J} \, \text{mol}^{-1} \, \text{K}^{-1} \) - \( S_{\text{HI}_{(g)}}^{\circ} = 49,3 \, \text{J} \, \text{mol}^{-1} \, \text{K}^{-1} \) Substituindo na fórmula, temos: \[ \Delta_{r} S^{\circ} = 2 \times 49,3 - (31,2 + 27,9) \] Vamos calcular o valor de \( \Delta_{r} S^{\circ} \). Calculate the value by following steps: - step0: Calculate: \(2\times 49.3-\left(31.2+27.9\right)\) - step1: Add the numbers: \(2\times 49.3-59.1\) - step2: Multiply the numbers: \(98.6-59.1\) - step3: Subtract the numbers: \(39.5\) A variação da entropia padrão, \( \Delta_{r} S^{\circ} \), da reação é de \( 39,5 \, \text{J} \, \text{mol}^{-1} \, \text{K}^{-1} \) ou \( 39\frac{1}{2} \, \text{J} \, \text{mol}^{-1} \, \text{K}^{-1} \).

Quick Answer

A variação da entropia padrão, \( \Delta_{r} S^{\circ} \), da reação é de \( 39,5 \, \text{J} \, \text{mol}^{-1} \, \text{K}^{-1} \).
Answered by UpStudy AI and reviewed by a Professional Tutor
UpStudy ThothAI
Self-Developed and Ever-Improving
Thoth AI product is constantly being upgraded and optimized.
Covers All Major Subjects
Capable of handling homework in math, chemistry, biology, physics, and more.
Instant and Accurate
Provides immediate and precise solutions and guidance.
Try Now
Ask Tutors
Ask AI
10x
Fastest way to Get Answers & Solutions
By text

Enter your question here…

By image
Re-Upload
Uploaded Files
xxxx.png0%
Submit
📸 STUDY CAN BE A REAL STRUGGLE
Why Not UpStudy It?
Select your plan below
Premium

You can enjoy

  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to answer and
    solution
Basic
  • Limited Solutions