Answer:
52.9 KJmol-1
Explanation:
From;
log(k2/k1) = Ea/2.303 * R (1/T1 - 1/T2)
The temperatures must be converted to Kelvin;
T1 = 25° C + 273 = 298 K
T2= 35°C + 273 = 308 K
R= gas constant = 8.314 JK-1mol-1
Substituting values;
log 2 = Ea/2.303 * 8.314 (1/298 - 1/308)
Ea = 52.9 KJmol-1
Answers:
Question 1) d. 4 moles
question 2) a. single displacement reaction
question 3) c. 2N2H4 + N2O4 ==>3N2+4H2O
question 4) a. 40 ml alcohol in 100 ml water
Answer:
A
Explanation:c C B D are just wrong hope this helps god bless
Answer:
Chemical to electrical to mechanical
Explanation:
The energy conversion going on in a battery - powered toy car is from chemical to electrical and then to mechanical energy.
According to the law of conservation of energy, energy is neither created nor destroyed but transformed from one form to another.
- A battery is a cell that is capable of producing electrical energy from chemical actions.
- This electrical energy is used to power rotors in the toy car which cause the mechanical motion of the device.