Question

check each statement about the temperature, check each item that is a unit of pressure, which of the following pairs of substances are held together by hudrogen bonds, multiple choice, name the phase

16. Check each true statement about the temperature 0 K. The K stands for kilo. The K stands for Kelvin. This is a temperature that is suitable for biological processes. It is absolute zero. This temperature is the middle of the Kelvin scale. This is the coldest possible temperature. Molecular motion is at its maximum at this temperature. Molecular motion ceases at this temperature. w tsos A 17, Check each item that is a unit of pressure. noheo mm Mg lon torr psi calorie to rtoi Suc cal/g°C .joule atmosphere mm Hg qsno olst nod aliod) lon A 18. Which of the following pairs of substances are held together by hydrogen bonding? alcohol and KCI water and ammonia acetone and gasoline water and oil alcohol and gasoline water and alcohol

Answer 1

16. Temperature 0 K means 0 Kelvin so second statement is true.

The first statement is not true as in 0 K, K doesn't mean Kilo (10³)

The body temperature is 37°C. At this temperature all biological processes take place in our body. We know that 0°C=273 K

So 37°C=37+273 K=310 K.

So the temperature suitable for biological processes is 310 K and not 0 K. So the third statement is false.

0 K is called absolute zero. So fourth statement is true.

0 K is the last temperature of the Kelvin scale and there is no temperature below that so it is not in the middle of the Kelvin scale. So fifth statement is false.

As 0°C=273 K

0-273°C=273-273=0 K

-273°C=0 K

This is the coldest possible temperature and there is no lower temperature that exists. So sixth statement is also true.

At this temperature, there is negligible vibrational motion but no rotational and translational motion of molecules i.e. the molecular motion is at its minimum. So seventh statement is false and eighth statement is also false.