Can anyone me with this ! my exam is day after tomorrow

a. Lithium is in its standard state

b.

c.

Explanation:

a. Elements in their standard states at room temperature and 1 atm pressure would have an enthalpy of formation of 0 kJ/mol. Lithium is metal at standard conditions, so its enthalpy of formation is 0 kJ/mol.

b. The equation representing the formation of a compound should following the rules below:

We should, hence, form 1 mol of LiOH from the following species:

We obtain the following equation:

c. Firstly, write the equation for the enthalpy of formation of water using the guidelines in (b):

Now given the equation:

As well as:

Notice that multiplying reaction (2) by 2, multiplying reaction (3) by 2, multiplying reaction (1) by -2 (that is, multiplying by 2 and reversing it) and adding them together will yield the target equation:

According to Hess's Law, we will perform the same steps with the enthalpy values and we will add them to get the final enthalpy value:

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.