is it energy? cause I beleave i did something like that before
Answer:
Q = 8.8 kJ
Explanation:
Step 1: Data given
The specific heat of a solution = 4.18 J/g°C
Volume = 296 mL
Density = 1.03 g/mL
The temperature increases with 6.9 °C
Step 2: Calculate the mass of the solution
mass = density * volume
mass = 1.03 g/mL * 296 mL
mass = 304.88 grams
Step 3: Calculate the heat
Q = m*c*ΔT
⇒ with Q = the heat in Joules = TO BE DETERMINED
⇒ with m = the mass of the solution = 304.88 grams
⇒ with c = the specific heat of the solution = 4.18 J/g°C
⇒ with ΔT = the change in temperature = 6.9 °C
Q = 304.88 g * 4.18 J/g°c * 6.9 °C
Q = 8793.3 J = 8.8 kJ
Q = 8.8 kJ
Answer:
1) The hydrogen-ion concentration is 0.001 M and pH of the solution is less than 7 which means that the solution is acidic.
2) The acid dissociation constant of a weak monoprotic acid is .
Explanation:
1) Concentration of hydroxide ions =
The pOH of the solution:
pH + pOH = 14
pH = 14 - pOH = 14 - 11 = 3
The pH of the solution is given as:
The hydrogen-ion concentration is 0.001 M and pH of the solution is less than 7 which means that the solution is acidic.
2)
Dissociation on weak monoprotic weak acid is given by :
Initially
0.5 M 0 0
At equilibrium
(0.5-x) x x
Given , hydrogen ions concentration =
The expression of a dissociation constant is given as:
The acid dissociation constant of a weak monoprotic acid is .
Featured snippet from the web
Homeostasis also refers to the process in which an organism maintains balance of things such as body temperature, water levels and salt levels. Many chemical reactions happen in order maintain homeostasis. Hormones must be made by breaking other molecules. ... Muscles need to produce heat in order to warm the body.
PV=nRT
P= ? atm
V= 2 L
T= 423 K
n= 2.3 moles
R= 0.08205
(P)(2)=(2.3)(0.08205)(423)
P= (79.826445)/(2)
P= 39.9132225 atm