Answer : To calculate the standard molar enthalpy of complete combustion of liquid ethanol can be done by using the formula given below;
Now, the enthalpies of the elements in their standard state is zero always.
So the
Here we can avoid the heat of enthalpy of oxygen,carbon dioxide and water as they exists in their standard states.
So the
=
Answer:
The rate of evaporation is directly proportional to Temperature because as the temperature increases, the energy of the particles increases. Due to increases in energy, particles start to break intermolecular bonding and evaporates.
To answer your question, the answer is number 1. hope this help
Answer:
Np-237, Ar-40.
Explanation:
Alpha particle is positively charged particle having a mass of 4 unit. Hence,when alpha is removed from any isotope it produces a element having mass 4 units less than original isotope that was before emission. Americium 241 isotopes used in the smoke detector which emit an alpha particle to produce neptunium-237.
Potassium-40 emits positron which is having negative charge to lower one proton and increase one neutron number in the particle and in such way it will produce 
not 
<span>Fe+ PbSO</span>₂<span>-->FeSO</span>₂<span>+2Pb</span>
