Physics

Question

Dani has 15.00 grams of water (c = 4.186 ) at 66°C. She adds 40.00 grams of water at 35°C. What is the final temperature of the liquids? Express the answer to the hundredths place.

2 Answer

  • Answer:

    43.45°C

    Explanation:

    Subtract 273 from 316.45 K to get the answer in Celsius.

  • Answer: 43.45°C

    Explanation:

    The equation for the final temperature is:

    T = (T1*m1 + T2*m2)/(m1 + m2)

    Where:

    T1 = 66 + 273.15 = 339.15 k

    T2 = 35 + 273.15 = 308.15 k

    (you need to convert the temperatures into kelvin degrees)

    m1 = 15g

    m2 = 40g

    T = (15g*339.15k + 40g*308.15k)/(15g + 40g) = 316.6k

    Returning to the celcius notation:

    T = 316.6 - 273.15 = 43.45°C

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