What is the specific heat of water?
approximately 4.2 J/g°C.
Specific Heat of Water
For liquid at room temperature and pressure, the value of specific heat capacity (Cp) is approximately 4.2 J/g°C. This implies that it takes 4.2 joules of energy to raise 1 gram of water by 1 degree Celsius.
How do you calculate calories from specific heat?
Multiply the change in temperature with the mass of the sample. Divide the heat supplied/energy with the product. The formula is C = Q / (ΔT ⨉ m) .
What is the specific heat of water in J kg C?
The specific heat capacity (cp) of water is 4182 J/kg°C at 20 °C (room temperature).
What is the specific heat of water in kg?
The SI unit of specific heat capacity is joule per kelvin per kilogram, J⋅kg−1⋅K−1. For example, the heat required to raise the temperature of 1 kg of water by 1 K is 4184 joules, so the specific heat capacity of water is 4184 J⋅kg−1⋅K−1.
What is the calorific value of water in joule calorie?
4.186 joule/gram °C
The specific heat of water is 1 calorie/gram °C = 4.186 joule/gram °C which is higher than any other common substance.
What is the formula to calculate calories?
It needs your age, weight, and height. There are two separate formulas for men and women: For women – BMR = 655.1 + (9.563 * weight in kg) + (1.850 * height in cm) – (4.676 * age) . For men – BMR = 66.5 + (13.75 * weight in kg) + (5.003 * height in cm) – (6.75 * age) .
What is the specific heat of water in KG?
Why is specific heat capacity of water?
The exact value of the specific heat capacity of water is 4182 J/kg°C. Now, water is quite commonly occurring and an important substance in our life. Therefore, there is a special way to identify the total amount of heat energy needed to raise one gram of water by a calorie (one degree Celsius).
How do you calculate specific heat of water?
The specific heat capacity of water is 4.18 J/g/°C. We wish to determine the value of Q – the quantity of heat. To do so, we would use the equation Q = m•C•ΔT. The m and the C are known; the ΔT can be determined from the initial and final temperature.
How do I calculate specific heat?
Specific heat is the amount of heat required to raise one gram of any substance one degree Celsius or Kelvin. The formula for specific heat is the amount of heat absorbed or released = mass x specific heat x change in temperature.
Why is the calorific value of water Zero?
Answer. Explanation: Water has the highest specific heat of any common substance at 1 calorie/gram °C = 4.186 joule/gram °C.
What is the constant value of specific heat of water?
4182 J/kg°C
The exact value of the specific heat capacity of water is 4182 J/kg°C.
What is the most accurate calorie formula?
Nowadays, the Mifflin-St Jeor equation is believed to give the most accurate result and, is therefore what we used in this calculator. This BMR formula is as follows: BMR (kcal / day) = 10 × weight (kg) + 6.25 × height (cm) – 5 × age (y) + s (kcal / day) , where s is +5 for males and -161 for females.
How many calories is 70kg?
(70 kg) person burns roughly 112 calories per 30 minutes of weight training. Body weight exercises and lifting weight can help break down muscle and promote muscle growth which increases our resting metabolic rate, aka, we burn more calories at rest.
What are the units for specific heat?
The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
What is Q in the specific heat formula?
The amount of heat gained or lost by a sample (q) can be calculated using the equation q = mcΔT, where m is the mass of the sample, c is the specific heat, and ΔT is the temperature change.
What is the calorific value of water in Joule per calorie?
What is the calorific value of water gas?
The calorific value of water gas is around 5.8 megajoules per cubic metre.
How many calories is 1 kg?
7700 calories
According to studies, for every 1 kg of weight loss, 7700 calories are needed, or 1000 calories are lost 0.13 kg. However, reducing calories and combining it with exercise will cause weight loss faster than without exercise.
What is the formula for a calorie?
Sedentary (little or no exercise): calories = BMR × 1.2 ; Lightly active (light exercise/sports 1-3 days/week): calories = BMR × 1.375 ; Moderately active (moderate exercise/sports 3-5 days/week): calories = BMR × 1.55 ; Very active (hard exercise/sports 6-7 days a week): calories = BMR × 1.725 ; and.
Is 1800 calories too low for a man?
Men and women should aim for 1,800 calories per day, which is considerably less than official guidelines of 2,500 for men, and 2,000 for women. PHE is issuing the advice because many people don’t account for calorific drinks when calculating their daily calorie intake, and go over the recommended guidelines.
Is a calorie a unit of heat?
The calorie (symbolized cal) is a unit of heat occasionally used in the centimeter-gram-second ( cgs ) system of physical units. Heat is a form of kinetic energy transfer from one medium or object to another.
What is specific heat of steam in calories?
Latent heat of steam = 536 calories per gm. Latent heat of ice = 80 cal/gm. Specific heat of ice =0.5 cal/gm degree ºC.
How do you calculate Q water?
What is Q n ∆ H?
q=n⋅ΔHfus , where. q – the amount of heat; n – the number of moles of a substance; ΔHfus – the molar enthlapy of fusion. In water’s case, the molar enthalpy of fusion is equal to 6.02 kJ/mol.