Question

Сколько воды можно нагреть на 50 градусов если сжечь 100 г бензина?

Answer 1

Дано:                                        Решение :
m воды -?                                   Q = qm ; Q=cmt => m=Q\ct
t-50      
 q=4,6*10'7                                 Q=4,6*10'7 *0,1=0,46*10'7дж
m бензина - 100г=0,1кг             m=0,46*10'7\4200*50 = 21,9кг
с=4200джкг\гр ц        Ответ: м=21,9кг

Answer 2

Calculating the Amount of Water Heated by Burning 100g of Gasoline

To calculate the amount of water that can be heated by burning 100g of gasoline, we can use the formula:

Q = qm

Where: - Q = heat energy absorbed by water (in joules) - q = specific heat capacity of water (in J/g°C) - m = mass of water (in grams)

Given: - q = 4.18 J/g°C (specific heat capacity of water) - m = 100g (mass of gasoline burned) - ΔT = 50°C (temperature change)

We can use the formula Q = qmΔT to find the heat energy absorbed by the water.

Calculation

Using the given values: Q = 4.18 J/g°C * 100g * 50°C Q = 4.18 * 100 * 50 Q = 20900 J

So, the heat energy absorbed by the water is 20900 joules when 100g of gasoline is burned and the temperature of the water increases by 50°C.