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**Forward and Reverse Reaction Rates (mol/(L·s)) vs Temperature** | Temperature (°C) | Forward rate | Reverse rate |

| --- | --- | --- |

| 20 | 0.10 | 0.46 |

| 30 | 0.18 | 0.38 |

| 40 | 0.30 | 0.30 |

| 50 | 0.51 | 0.24 |

| 60 | 0.88 | 0.19 |

A system is at equilibrium when the forward and reverse reaction rates are equal. According to the data, at which temperature is this system at equilibrium?

  1. 30 °C
  2. 40 °C
  3. 50 °C
  4. 60 °C

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