Please help! When a 200.0 g block of iron is placed into 1500.0 g of water, the temperature of the iron increases by 50.0 °C. The specific heat of iron is 0.449 J/g^ C . What is the temperature change of the water? (0.715 C)
Thank you!

Explanation:

Hello there!

In this case, according to the given information, it is possible to realize that the heat relationship between iron and water is given by:

Which in terms of mass, specific heat and temperature is:

Thus, by solving for the change in the temperature of water we will obtain:

Which is negative because iron increases its temperature and therefore water decreases it.

Regards!

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.