# Solving for Water Temperature: 4000J Added to 400g at 20°C

• reallydumb
In summary, 4000J of heat energy is added to 400 grams of water at 20 degrees Celsius. The resulting temperature of the water can be calculated using an equation that relates the given quantities of energy, mass, and temperature. This equation can be found in the textbook or class notes, or by referring to the link provided by Tsportmat.
reallydumb
4000J of heat energy are added to 400 grams of water at 20 degrees celcius. What is the resulting temperature of the water?

I know that I'm supposed to find Kelvin (K) but I'm not sure on which equation to use..

Last edited:
Look in your textbook and class notes, you should be able to find an equation that relates the quantities that are given / asked for (energy, mass, temperature).

Redbelly98 said:
Look in your textbook and class notes, you should be able to find an equation that relates the quantities that are given / asked for (energy, mass, temperature).

Thats why I asked because I really can't find it in the book or notes

Please just tell me the equation xD

It's at the link Tsportmat gave. Have a look.

I started physics 2 months ago so I haven't a clue of most of the stuff in that link, we have'nt come across it yet

Anyway nevermind

## What is the formula for calculating the final temperature after adding heat to a substance?

The formula for calculating the final temperature after adding heat to a substance is:
Tf = (Q + (m x Cp x ΔT)) / m
Where Tf is the final temperature, Q is the amount of heat added, m is the mass of the substance, Cp is the specific heat capacity of the substance, and ΔT is the change in temperature.

## How do I determine the specific heat capacity of a substance?

The specific heat capacity of a substance can be determined by conducting a calorimetry experiment where the amount of heat added to a known mass of the substance is measured and the change in temperature is recorded. The specific heat capacity can then be calculated using the formula:
Cp = Q / (m x ΔT)
Where Cp is the specific heat capacity, Q is the amount of heat added, m is the mass of the substance, and ΔT is the change in temperature.

## What are the units of measurement for heat and temperature?

The units of measurement for heat are joules (J) or calories (cal). The units of measurement for temperature are degrees Celsius (°C) or Kelvin (K).

## What does it mean to add 4000J of heat to 400g of water at 20°C?

Adding 4000J of heat to 400g of water at 20°C means that 4000 joules of energy will be transferred to the 400g of water, resulting in a change in temperature. The starting temperature of the water is 20°C, and the final temperature will be determined using the formula for calculating the final temperature after adding heat to a substance.

## How does the mass of a substance affect the final temperature after adding heat?

The mass of a substance plays a crucial role in determining the final temperature after adding heat. The larger the mass, the more heat will be required to raise the temperature by a certain amount. This is reflected in the formula for calculating the final temperature, where the mass is in the denominator. Therefore, a larger mass will result in a smaller change in temperature compared to a smaller mass when the same amount of heat is added.

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