Question

các bạn giúp mình với, 12h cô mình kiểm tra roi

Answer 1

\(Q_1=m_1.c_1.\Delta t\)

\(=0,8.380.\left(100-30\right)\)

\(=21280\left(J\right)\)

\(Q_2=m_2.c_2.\Delta t\)

\(=2,5.4200.\Delta t\)

\(=10500.\Delta t\)

Do \(Q_1=Q_2\) nên \(10500.\Delta t=21280\)

\(\Rightarrow\Delta t=2,03^oC\)

Answer 2

\(Q_{thu}=Q_{tỏa}\)

\(\Leftrightarrow m_1c_1\Delta t_1=m_2c_2\Delta t_2\)

\(\Leftrightarrow0,8.380.\left(100-30\right)=2,5.4200.\Delta t_2\)

\(\Leftrightarrow21280=10500\Delta t\Rightarrow\Delta t_2=2,02\left(6\right)^0C\)