Please look at the first picture to answer key questions

Post by **answerhappygod** » Thu Jul 07, 2022 12:12 pm

: Please Look At The First Picture To Answer Key Questions 1 (81.04 KiB) Viewed 26 times

: Please Look At The First Picture To Answer Key Questions 2 (56.09 KiB) Viewed 26 times

Before 20.0 g H₂O T₁ = 20.0 °C After 20.0 g H₂O Tf=40.0 °C Case 1 beaker q=+1674 J ⇓ Case 2 40.0 g H₂O T₁ = 20.0 °C 40.0 g H₂O T₁=40.0 °C beaker q=+3348 J J Case 3 refrigerator -837 J 20.0 g H₂O T₁=20.0 °C 20.0 g H₂O Tf=10.0 °C ⇓
Key Questions 1a. Compare Case 1 and Case 2 in the Model. Is there a direct relationship or an inverse relationship between q and m? (Hints: What is the mass of water in Case 1? in Case 2? What is the amount of heat involved in Case 1? in Case 2? As the mass of water increases, does the amount of heat involved increase or decrease?) There is a relationship between q and m. b. Compare Case 1 and Case 3 in the Model. Is there a direct relationship or an inverse relationship between q and AT? (Hints: What is the absolute magnitude of the change in temperature in Case 1? in Case 3? What is the absolute magnitude of heat in Case 1? in Case 3? As the change in temperature increases, does the amount of heat involved increase or decrease?) There is a relationship between q and AT. c. The proportionality constant that relates q to m and AT is symbolized as c and is called the specific heat capacity. Complete the following formula based on your answers to parts (a) and (b), above, and the following symbols: AT = temperature change of a substance, c = specific heat capacity, m = mass of the substance, q = amount of heat energy q=c d. Use the Model and dimensional analysis (the factor label method) to calculate the value and units of the specific heat of water (to 3 sig figs).