Explanation:
The given data is as follows.
= 50 ml, 
= 345 K
= 298 K, 
= 317 K,
= 50 ml
Now, we will calculate the heat energy as follows.
= 
= 5857.6 J
= 
= 3974.8 J
As, 
so there will be loss of heat. And, some heat will go to the calorimeter.
Hence, 
= 1882.8 J
We assume that the temperature of (calorimeter + water) is 298 K. Hence,
dT = 
= (317 - 298) K
= 19 K
Hence, we will calculate the specific heat as follows.
C = 
= 
= 99.1 J/K
Thus, we can conclude that the value of 
for the calorimeter is 99.1 J/K.
Answer:
Chemical reactions takes place
Explanation:
Chemical energy stored in bonds of chemical compound are released when chemical reactions takes place.
Chemical energy is a form of potential energy that is found in chemical bonds.
- When chemical reactions occur, bonds are broken and formed again.
- The process of breaking and forming new bonds releases chemical energy.
- In this manner most chemical reactions are often accompanied by energy changes
- The energy changes is due to the formation of new bonds.
Answer:
Mg
Hope this helps :D sorry if im wrong :(
2)A complete desktop uses an average of 200 Watt hours (Wh). This is the sum of the average consumption per hour of the computer itself (171 W), the internet modem (10 W), the printer (5 W) and the loudspeakers (20 W). Assuming that a computer is on for eight hours a day, the annual consumption comes to 600 kWh. That corresponds to CO2 emissions of about 175 kg per year, i.e. 1.75 % of the average annual emission of a Belgian.
