Question

How much heat is needed to raise the temperature of 50.0 g of water from 277 K to 315 K?

Answer 1

Answer:

You will need 7.953 kJ heat energy to raise the temperature of water from 277K to 315K.

Explanation:

To calculate how much heat is needed to raise the temperature of any substance, you need:

The mass of the substance,  m, which for you is 50.0 g

The temperature change that occurs,  ΔT, which for you is:

Δ$T=(315-277)K=38K$

The specific heat capacity of the substance,  c,

For water, the value of  c  is  4.186J/gK

Then, this is the equation you need:

$Q=mc$ΔT

Where Q is the heat needed

So,  

$Q=(50.0g)(4.186J/gK)(38K)=7953.4J=7.9534kJ$

You need 7.953 kJ to raise the temperature of water from 277K to 315K.