Solution :
Given :
Initial temperature of the refrigerant is :
= ( 39.37 + 273 ) K
= 312.3 K
Room which is maintained at constant temperature is :
= (22+273) K
= 295 K
The thermal energy transferred to the room is :
Q = 400 kJ
=
Therefore, the total entropy generation during the thermal energy process is :
Here, -Q = heat is leaving the system maintained at a temperature of K.
+Q = heat is entering the system maintained at a temperature of K.
Therefore, substituting the values :
= [-1280.8197 + 1355.9322]
= 75.1125 J/K
= 0.0751125 kJ/K
= 0.075 kJ/K
Answer is: acid.
An acid<span> is a </span>molecule<span> or </span>ion<span> capable of donating </span>proton or hydrogen ion H⁺.
pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity <span>an </span>aqueous solution<span>.
</span>pH number of <span>lemon juice (citric acid) and vinegar (acetic acid CH</span>₃COOH) is below seven (pH<span><7). For bases pH is greater than seven.</span>
Answer:
• 1 kilocaloric equals 1000 gram calories
• 1 kilocalorie is equals to 4184 Joules of energy.
Explanation:
One kilocalorie is equals to 1000 gram calories because one kilo is equals to or have 1000 grams. One kilocalorie is equals to 4184 Joules of energy while on the other hand, one calorie is equals to 4.184 Joules of energy because one calorie is 1000 times smaller than Kilocalorie so calorie has also 1000 times lower energy than kilocalorie. Kilo is the prefix which means 1000 so we can say that One kilocalorie is equals to 1000 gram calories.
This is called as such because the proton or H+ has taken on both lone electron pairs on the oxygen in the water molecule. As such it is s coordinate covalent bond.
Answer:
Potassium is an s block element as the electrons of potassium are in the outermost s orbital in an electron shell. EXPLANATION: Alkali metals are known to be group 1 metals placed in s block.