Question

If you have 310.0 mL of water at 25.00 °C and add 140.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

Answer 1

@zbay

Answer 2

Using the first law of thermodynamics (I'm not sure about if it's the first)
ΔU = Q + ΔW=0( you need more hypothesis to do this)
ΔU_1+ΔU _2=0
m_1 : mass of 310.0 mL of water
m_2 : mass of 310.0 mL
\[m_1c(T_f-T_0)+m_2c(T_f-T_1)=0\]
\[T_f=\frac{m_1T_1+m_2T_2}{m_1+m_2}\]
is that chemistry or thermodynamic !

Answer 3

uhh..chemistry

Answer 4

uhhh.. i don't understand the formula