Answer:
The gas temperature increases.
Explanation:
The type of process is an ISOCHORIC process in which the volume is constant. The work done by the system is zero.
The gas will only gain internal energy from the heat energy transferred to the system externally.
The pressure also increases in this type of process.
Answer:
Explanation:
We will need a balanced chemical equation with masses and molar masses, so, let's gather all the information in one place.
MM: 102.89 159.81
2NaBr + F₂ ⟶ 2NaF + Br₂
m/g: 25.4
(a) Moles of Br₂
(b) Moles of NaBr
(c) Mass of NaBr
There are several reasons behind why they must keep accurate notes.
There may be a mistake or an anomaly that occurs during the process, and something completely different than the desired compound may be created and the process may need to be repeated.
The investigation may be successful and may need to be repeated.
The investigator may need to prove that the project was done by him and the notes may help him to do so. (hence why they must be dated and signed.)
The investigator may need them to protect him from legal action.
The pharmaceutical company may need proof that the possible medicine is safe and effective, and that it works as it should.
Explanation:
A covalent bond is defined as the occurrence of a bond due to the sharing of electrons between the combining atoms.
Atomic number of hydrogen atom is 1 and its electronic configuration is . So, in order to complete its octet it needs to gain or mutually shares one electron.
A covalent bond is generally formed between non-metal atoms.
Thus, we can conclude that hydrogen has only one electron that will be involved in the formation of a covalent bond.
<u>Answer:</u> The activation energy for backward reaction is +25 kJ
<u>Explanation:</u>
For the given chemical equation:
We are given:
Enthalpy of the reaction = -20 kJ
As, the enthalpy of the reaction is negative, the reaction is said to be exothermic in nature.
To calculate the activation energy for the reverse reaction, we use the equation:
where,
= Activation energy of the forward reaction = 5 kJ
= Activation energy of the backward reaction = ?
= Enthalpy of the reaction = -20 kJ
Putting values in above equation, we get:
Hence, the activation energy for backward reaction is +25 kJ