Question

Какое количество теплоты получить человек выпив стакан чая массы 200г при температуре 46,5 градусов цельси.Температура тело человека равна 36,5 градусов цельси теплоемкость воды равно 4200 дж/кг.келвин.ПОЖАЛУЙСТА ПОЛНОЕ РЕШЕНИЕ

Answer 1

Дано
t1=46,5
m=200г=0,2кг
t2=36,5
c=4200дж/кг*к
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Q-?
q=c*m(t1-12)=4200*0,2*(46,5-36,5)=8400 Дж=8,4 кдж

Answer 2

Calculation of Heat Energy

To calculate the amount of heat energy received by a person after drinking a cup of tea, we can use the formula:

Q = mcΔT

Where: - Q is the heat energy (in joules) - m is the mass of the tea (in kilograms) - c is the specific heat capacity of water (in joules per kilogram per degree Celsius) - ΔT is the change in temperature (in degrees Celsius)

Given information: - Mass of the tea (m) = 200 grams = 0.2 kilograms - Initial temperature of the tea = 46.5 degrees Celsius - Final temperature of the tea = 36.5 degrees Celsius - Specific heat capacity of water (c) = 4200 joules per kilogram per degree Celsius

Calculation Steps:

Step 1: Convert the mass of the tea to kilograms: - Mass of the tea (m) = 200 grams = 0.2 kilograms

Step 2: Calculate the change in temperature: - ΔT = Final temperature - Initial temperature - ΔT = 36.5 degrees Celsius - 46.5 degrees Celsius - ΔT = -10 degrees Celsius

Step 3: Calculate the heat energy using the formula: - Q = mcΔT - Q = 0.2 kilograms * 4200 joules per kilogram per degree Celsius * -10 degrees Celsius

Now let's calculate the heat energy:

Q = 0.2 * 4200 * -10

Q = -840 joules

Therefore, the person would receive -840 joules of heat energy after drinking the 200g cup of tea at a temperature of 46.5 degrees Celsius, assuming the body temperature of the person is 36.5 degrees Celsius.

Please note that the negative sign indicates that heat is being lost from the person's body to the tea.