This would depend on the temperature of the water before you add the metal and what type of metal it is. if its copper it absorbs heat fast and would not change the temperature much but if you dropped lead into it then it would have to absorb more heat making the temperature lower than the copper. There are too many variables to answer the question.
Temperature of the water
When hot metal is added into the water then the metal looses its energy into the water and this heat is gained by the water, so the temperature gets increases when hot metal added into it i.e final temperature is greater than initial temperature of water.
When allowed to stand for long enough, the final temperature will reach room temperature.
When allowed to stand for long enough, the final temperature will reach room temperature.
Atmospheric pressure and saline content of the water.
The temperature of the metal bar decreases.The temperature of the cool water increases.The final temperature of the metal bar will be the same as the final temperature of the water.
Temperature of the water
When hot metal is added into the water then the metal looses its energy into the water and this heat is gained by the water, so the temperature gets increases when hot metal added into it i.e final temperature is greater than initial temperature of water.
42.3 Celsius
You think probable to an exothermic reaction.
40 degree
If the metal's temperature has equilibriated with the water, than the temperature of the system (water and metal) will be the same.
1.77
water
yes
When allowed to stand for long enough, the final temperature will reach room temperature.