<span>Unless otherwise stated, the common room
temperature and pressure is at 25°C and 1 atmosphere, respectively. At this
temperature and pressure hydrogen chloride is expected to be in a gaseous state.
Since it is a diatomic molecule consisting of hydrogen and chlorine atoms, they
have weak forces of interaction between molecules resulting to an uncondensed
state at room temperature. If the atmosphere where is it suspended has
moisture, hydrogen chloride gas is expected to react with the moisture to form
fumes of hydrochloric acid.</span>
Energy released from changing the phase of a
substance from the liquid phase to solid phase can be calculated by using the
latent heat of fusion. The heat of fusion of iron is calculated as follows:
<span>Energy = mL(f)</span>
<span>9840 cal (4184 J / 1 cal) = .200 kg x L(f)</span>
L(f) = 2.06 x10^8 J/kg
C. Life comes from non-living things like the air. Also known as anomalous generation, this idea is based on pre-Aristotelian philosophers that believed that organisms such as mites could be formed from non-living things such as dust. Some of these ideas were adopted into Christianity and the most famous modern tests to test this theory were performed by Pasteur.
There number of calories that are required to raise the temperature of 105 g of water from 30.0 c to 70.0 c is calculated as follows
Q(heat)= mass(m) x specific heat capacity of water ( 1 cal/g/c) x delta T ( change in temperature
delta T = 70.0- 30.0= 40.0 c
Q= 105 g x 1 cal/g/c x 40 c = 4200 calories is needed to raise temperature of water from 30 c to 70 c