Register
Heater has power rating of 500W inserted in 1Kg of water for half of a minute. Water was at 20 degrees Celsius. What is the temperature of water after half a minute
151,668 views
22 votes
22 votes
Heater has power rating of 500W inserted in 1Kg of water for half of a minute. Water was at 20 degrees Celsius. What is the temperature of water after half a minute

User Midas
by
2.8k points

1 Answer

7 votes
7 votes

Answer:

23.585°C

Step-by-step explanation:

500W/s = 500J/s half a minute = 30s

30 x 500J = 15000J in half a minute

the specific heat of water is 4.184J/gC

Use the specific heat formula:

(20C)(1kg)(4184J/kgC)= 83680J

83680J + 15000J = 98680J

98680J = (x)(1kg)(4184J/kgC)

98680J = 4184x

Divide

x = 23.585°C

User Xtlc
by
3.0k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

1.6m questions

2.0m answers

Other Questions

After a light turns green , Lesly accelerates to 120 km/hr over 100 meters . What is her acceleration in m/s^2
If a constant fotce of 490 newtons is applied to an object and it proceeds to accelerate in the opposjte direction at 9.8 meters per second, every second, what is its mass?
How can I solve the following? In (Figure 1), let V = 15.0 V and C1=C2=C3= 24.2 μF. Part A: How much energy is stored in the capacitor network as shown in (Figure 1)? Part B: How much energy would be stored
1. if i start with 48 ml of water in a graduated cylinder, after submerging an object the water level rises to 63 ml, what is the volume of the object. 2. if i start with 36 ml of water in a graduated
Why is the system of si unit developed
Link Copied!