Answer:
1 .C) a gas with a low specific heat
2. Iron
3. Option B) temperature
Explanation:
Thinking process:
The heating system depends on the substance required to heat or cool a system. The heat capacity is the increase in the temperature of a substance of a unit mass. A unit mass is 1 kg
For heating solutions, a substance with a low specific heat capacity is needed. Thus, a substance used to heat hot water system is gas. The vapor has two energies :vaporization and enthalpy of vaporization added to it.
2. heat, is given by:
[tex]Q = mC\delta\theta[/tex]
1840 = 0.2 * (45-20) * C
C = [tex]\frac{1840}{0.2*20}[/tex]
= 460 J
= 0.460 J/gC
From the tables, the matter is iron
3. Temperature is the measurement of the average kinetic energies of a substance. This energy is then translated as heat. Hence the measure of thermal energy.
