Table of Contents

- 1 Does water have a higher or lower heat capacity?
- 2 Why does 2 liters of boiling water not have twice as great a temperature as 1 liter of boiling water?
- 3 Which has more total kinetic energy internal energy one liter of boiling water or two liters of boiling water which has a higher temperature?
- 4 What has a higher specific heat than water?
- 5 Can heat capacity be negative?
- 6 What happens when the temperature decreases?
- 7 What happens to the temperature if more heat is added to a sample of boiling water in stove at 1 atm?
- 8 What happens to heat energy during the phase changes in number 1?
- 9 How much energy does it take to heat 100 liters of water?
- 10 What is the formula for specific heat of water?
- 11 Why does a larger body of water cool faster?

## Does water have a higher or lower heat capacity?

Water has a high specific heat capacity—it absorbs a lot of heat before it begins to get hot.

## Why does 2 liters of boiling water not have twice as great a temperature as 1 liter of boiling water?

Temperature is not a measure of the total kinetic energy of all the molecules in a substance. Two liters of boiling water have twice as much kinetic energy as one liter. The temperatures are the same because the average kinetic energy of molecules in each is the same.

**Does more water mean more heat energy?**

Your larger body of water, simply due to the fact that there’s more of it, has more heat energy. It’ll take longer to cool, even though it’s losing heat faster.

### Which has more total kinetic energy internal energy one liter of boiling water or two liters of boiling water which has a higher temperature?

Heat is a flow of thermal energy from hotter to colder because of a difference in temperature. (think water fall!) There is twice as much molecular kinetic energy in 2 liters of boiling water as in 1 liter of boiling water.

### What has a higher specific heat than water?

On a mass basis hydrogen gas has more than three times the specific heat as water under normal laboratory conditions. Diatomic gases under ambient conditions generally have a molar specific heat of about 7cal/(mol K), and one mole of hydrogen has only 2g mass.

**Why does water have a much higher specific heat capacity than most liquids?**

Water has a higher specific heat capacity because of the strength of the hydrogen bonds. It requires a significant of energy to separate these bonds.

#### Can heat capacity be negative?

If the system loses energy, for example, by radiating energy into space, the average kinetic energy actually increases. If a temperature is defined by the average kinetic energy, then the system therefore can be said to have a negative heat capacity.

#### What happens when the temperature decreases?

When we decrease the temperature, less heat energy is supplied to the atoms, and so their average kinetic energy decreases. When they enter a phase transition, such as freezing from a liquid to a solid, the temperature is not decreasing or increasing, and stays constant.

**Which loses heat faster?**

A will lose heat faster. Conduction and convection scale as the temperature difference, which is almost twice as large for A as for B. The warmer water in A will also evaporate faster, removing more heat as it does. A hot cup of coffee left in a cool room will cool down because the room is colder than the coffee.

## What happens to the temperature if more heat is added to a sample of boiling water in stove at 1 atm?

Adding heat to a boiling liquid is an important exception to general rule that more heat makes a higher temperature. When energy is added to a liquid at the boiling temperature, its converts the liquid into a gas at the same temperature.

## What happens to heat energy during the phase changes in number 1?

If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance. The heat is used to break the bonds between the ice molecules as they turn into a liquid phase.

**Does higher specific heat mean higher temperature?**

Explanation: Specific heat is Jg−oK . So, a high value means that it takes MORE energy to raise (or lower) its temperature. Adding heat to a “low specific heat” compound will increase its temperature much more quickly than adding heat to a high specific heat compound.

### How much energy does it take to heat 100 liters of water?

100 liters * (45-10) = 3500 kcal. 1 kcal is equal to 1/860 kWh, so: 3500kcal / 860 ≈ 4 kWh (13.6 kBtu/h) But this is an electric energy needed to heat upper 100 liters by 35°C.

### What is the formula for specific heat of water?

E = energy (kJ, Btu) c p = specific heat of water (kJ/kg oC, Btu/lb oF) (4.2 kJ/kg oC, 1 Btu/lb m oF for water) dt = temperature difference between the hot water and the surroundings ( oC, oF)) m = mass of water (kg, lb m) Water is heated to 90 oC. The surrounding temperature (where the energy can be transferred to) is 20 oC.

**How do you calculate the amount of energy stored in water?**

Water is often used to store thermal energy. Energy stored – or available – in hot water can be calculated. E = c p dt m (1) where. E = energy (kJ, Btu) c p = specific heat of water (kJ/kg oC, Btu/lb oF) (4.2 kJ/kg oC, 1 Btu/lb m oF for water)

#### Why does a larger body of water cool faster?

Note that ‘cooling’ and ‘losing heat’ aren’t synonymous. Your larger body of water, simply due to the fact that there’s more of it, has more heat energy.