Ask Question
12 December, 01:19

A 52.9g sample of brass, which has a specific heat capacity of 0.375·J·g-1°C-1, is put into a calorimeter (see sketch at right) that contains 100.0g of water. The temperature of the water starts off at 15.0°C. When the temperature of the water stops changing it's 18.4°C. The pressure remains constant at 1 atm. Calculate the initial temperature of the brass sample. Be sure your answer is rounded to 2 significant digits.

+3
Answers (1)
  1. 12 December, 01:31
    0
    T₁ = 90°C

    Explanation:

    Let system 1 = > brass sample & system 2 = > water

    ∑q = 0 = q₁ + q₂ = (mcΔT) ₁ + (mcΔT) ₂

    = [ (52.9g) (0.375j/g°C) (18.4°C - T₁) ]₁ + [ (100.0g) (4.184j/g°C) (18.4°C - 15°C) ]₂ = 0

    => 19.83 (18.4°C - T₁) + 1423 = 0 = > 365 - 19.83T₁ + 1423 = 0

    =>19.83T₁ = 1788 = > T₁ = (1788/19.83) °C = 90°C
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “A 52.9g sample of brass, which has a specific heat capacity of 0.375·J·g-1°C-1, is put into a calorimeter (see sketch at right) that ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers