Question

By how much does the temperature of mercury increase? the specific heat of mercury is 140

Answer 1

The exact temperature increase of mercury cannot be determined with the information provided; additional data such as mass of mercury and the amount of heat added is required to use the specific heat capacity formula.

To determine by how much the temperature of mercury increases, you use the specific heat capacity formula: q = mcΔT, where q is the heat energy transferred, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature. The question does not provide all the necessary information (i.e., the mass of mercury or the amount of heat added), which is required to calculate the temperature increase using the given specific heat of mercury (140 J/kg°C or cal/g°C).

More data is needed to provide a precise answer on how much the temperature of mercury will increase when a certain amount of heat is applied.

Answer 2

Heat energy = 140 J = 20/1000 * sp.heat * ( change in temp.)
= 20/1000 * 139 * temp. increase
= 2.78 * temp. incr.
Increase in temp = 100/2.78 = 35.97 K.
to raise the temp.of 20 g of water by 35.97 K
= 20/1000 * 4186 * 35.97
= 3011.5 J