If a piece of aluminum with a mass of 3.99 g and a temperature of 100.0 °C is dropped
in 10.0 cm3 of water at 21.0 °C, what will be the final temperature of the system?
(Hint: Remember the density of water is 1.00 g / mL)

The final temperature of the system is 27.3°C.

Explanation:

Heat lost by aluminum = 3.99 × 0.91 × (100-T)

                                     = 3.631 (100-T)

Heat gained by water = 10 × 4.184 × (T-21)

                                    = 41.84 (T-21)

As,

                                Heat gained = Heat loss

                          or, 3.631(100-T) = 41.84(T-21)

                          or,363.1 -  3.631 T = 41.84 T - 878.64)

                          or, (41.84+ 3.631) T = 878.64 +363.1

                          or  T=

                         or, T = 27.3°C

Hence the final temperature is 27.3°C.

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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