Respuesta :
Answer:
The amount of heat associated with 169 g of mercury is 1.557 kiloJoules.
Explanation:
Mass of mercury = m = 169 g
Change in temperature of the mercury = [tex]\Delta T=12.5^oC-78.8^oC=-66.3^oC[/tex]
The specific heat of mercury = c = 0.139 J/g°C
Heat associated with mercury: Q
[tex]Q=mc\Delta T[/tex]
[tex]Q=169 g\times 0.139 J/g ^oC\times (-66.3^oC)=1,557.45 J=1.557 kJ[/tex]
Negative sign indicates that heat was released when mercury is cooled down.
The amount of heat associated with 169 g of mercury is 1.557 kiloJoules.
Answer:
In kJ the heat released = 1.5574 kJ = 1.56 kJ
Explanation:
The specific heat of a substance is the amount of heat change when one gram of a substance undergoes a temperature change on 1 degree celsius.
The formula will be:
[tex]Heat change=specificheatXchangeintemperatureXmass[/tex]
mass = 169 g
specific heat = 0.139 J/g·°C
temperature change = [78.8°C]-[ 12.5°C]=66.3 °C
Heat released = [tex]169X66.3X0.139=1557.4J[/tex]
In kJ the heat released = 1.5574 kJ
