Respuesta :
Answer:
1) No heat is absorbed since the temperature rose by 8.3 degrees . There will be heat absorbed, when the temperature cools down.
2) There is 903.71 Joules of energy release. This is an exothermic reaction, so ΔH will be negative.
Explanation:
Step 1: Data
Mass of iron metal =1.104 grams
Mass of hydrochloric acid = 26.023 grams
The temperature rises from 25.2 °C to a maximum of 33.5 °C
Step 2: The balanced equation
2Fe(s) + 6HCl(aq) → 2FeCl3 (aq)+3H2(g)
(a) Determine the amount of heat (in J) absorbed by the reaction mixture.
No heat is absorbed since the temperature rose by 8.3 degrees . There will be heat absorbed, when the temperature cools down.
(b) How much heat (in J) was released by the reaction that occurred?
q = m*C*∆T
⇒ with q = the heat transfer (in Joule)
⇒ with m = the mass (in grams)
⇒ with C = the specific heat of water = 4.184 J/g°C
⇒ with ΔT = The change in temperature = T2 - T1 = 33.5 °C - 25.2 °C = 8.3 °C
q = (26.023g)*(4.184 J/g°C)(8.3 deg) = 903.71 J of heat released
There is 903.71 Joules of energy release. This is an exothermic reaction, so ΔH will be negative.
