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Evaluation Input Image

Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35°C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid. If the compressor consumes 1.2 kW of power, determine the COP of the heat pump.<image 1>



(A) 2.64


(B) 2.54


(C) 2.44


Answer with the option's letter from the given choices directly. No punctuation.


Google: Gemini Pro Vision 1.0
mmmu / Energy_and_PowerPublic

C


Expected Answer: A

Difficulty: Hard

Subfield: Thermodynamics

Evaluation

Evaluation ID
8619b256-f656-43ab-8d3c-c435e4406443
Created
February 21, 2024
Raw Output
{
  "id": "gen-dQsZI7ml8sOTxaHMEiiW2cH5XbFh",
  "model": "google/gemini-pro-vision",
  "choices": [
    {
      "message": {
        "role": "assistant",
        "content": " C"
      },
      "finish_reason": "STOP"
    }
  ],
  "object": "chat.completion",
  "created": 1708556736,
  "usage": {
    "prompt_tokens": 1520,
    "completion_tokens": 4,
    "total_tokens": 1524
  }
}