Solve Heat Capacity Question: 12kg Water, 15.4°C to 93°C

Thread starter geffman1
Start date Apr 4, 2009
Tags

Capacity Heat Heat capacity

AI Thread Summary

To calculate the heat required to raise the temperature of 12 kg of water from 15.4°C to 93°C, the formula used is Q = mCΔT, where Q is the heat energy, m is the mass, C is the specific heat capacity, and ΔT is the change in temperature. The mass (m) is given as 12 kg, and the temperature change (ΔT) is 77.6 K. The specific heat capacity (C) of water is typically 4.186 J/g°C or 4186 J/kg°C. By substituting these values into the equation, the total heat energy required can be calculated. Understanding the specific heat capacity is essential for solving this type of heat capacity problem.

Apr 4, 2009

geffman1

Homework Statement

hey guys I've got a question.
'calculate the amount of heat necessary to raise the temperture of 12kg of water from 15.4degrees to 93 degrees.

My working= h=mCdelatT
m=12000
C?
Delta T=77.6K

just wondering how i find C? (heat capacity)

thansk for any help

Homework Equations

The Attempt at a Solution

Physics news on Phys.org

Apr 5, 2009

Borek

Mentor

Tables.

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...

View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...

View full post »