Ask Question
5 August, 15:41

How many joules are needed to warm 25.5 grams of water from 14ºC to 22.5ºC? A. - 8.4x103J B. 9.1 x 102J C. - 9.1x102J D. 8.4x103J

+1
Answers (1)
  1. 5 August, 17:52
    0
    B. 9.1 * 10² J

    Explanation:

    The formula for the amount of heat (q) absorbed is

    q = mCΔT

    1. Calculate ΔT

    ΔT = 22.5 °C - 14 °C = 8 °C

    2. Calculate q

    q₂ = mCΔT = 25.5 g * 4.184 J·°C⁻¹g⁻¹ * 8 °C = 9 * 10² J

    Note: The answer can have only one significant figure, because you measured the starting temperature of the water only to the nearest degree.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “How many joules are needed to warm 25.5 grams of water from 14ºC to 22.5ºC? A. - 8.4x103J B. 9.1 x 102J C. - 9.1x102J D. 8.4x103J ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers