Answer:
Kj/mol
Its an endothermic reaction
Explanation:
Enthalpy can be evaluated by using following formula -

where
q is the enthalpy or change in internal energy
m is the mass in kg
c is the specific heat
and
is the change in temperature
Mass of HCl is equal to
g/mol
or
Mass of HCl is equal to
Kg/mol
Substituting the given values in above equation, we get-

Kj/mol
Enthalpy is positive thus it is an endothermic reaction
Answer:
Q = 25360.269 j
Explanation:
Given data:
Mass = 165 g
Initial temperature = 10.55 °C
Final temperature = 47.32°C
Energy absorbed = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = T2 - T1
ΔT = 47.32°C - 10.55 °C
ΔT = 36.77 °C
Q = m.c. ΔT
Q = 165 g . 4.18 j/g.°C . 36.77 °C
Q = 25360.269 j